Preliminary Screening Criteria

Preliminary screening turns a large patent result set into a focused list for deeper FTO review. After conducting a comprehensive patent search, you may have identified hundreds or even thousands of potentially relevant patents. Now comes a critical challenge: Which patents actually warrant detailed analysis?

This is where preliminary screening comes in. Preliminary screening is a rapid assessment process that quickly identifies which patents pose genuine FTO risks and which can be excluded from further analysis. Done effectively, preliminary screening saves time and resources while ensuring you don’t miss important patents.

What is Preliminary Screening?

Preliminary screening is a rapid, first-pass assessment of patents identified in your search to determine which ones warrant detailed analysis. It’s designed to be quick and efficient, typically taking 15-30 minutes per patent.

Goals of Preliminary Screening

• Identify High-Priority Patents: Identify patents that clearly warrant detailed analysis
• Exclude Irrelevant Patents: Exclude patents that are clearly not relevant to your technology
• Flag Uncertain Patents: Identify patents that require further investigation
• Allocate Resources Efficiently: Focus detailed analysis resources on the most promising patents

Preliminary Screening Criteria

Criterion 1: Technical Relevance

Question: Does the patent cover technology similar to your Subject Technology?

Assessment Approach:

• Read the patent title and abstract
• Scan the claims for relevant terminology
• Review the drawings and specification
• Assess whether the patent covers similar technology

Scoring:

• High Relevance: Patent clearly covers technology similar to your Subject Technology
• Medium Relevance: Patent covers related technology that might be relevant
• Low Relevance: Patent covers different technology area
• Not Relevant: Patent is clearly unrelated to your technology

Example:

• Your Subject Technology: Machine learning for occupancy detection
• Patent A (High Relevance): “Machine learning framework for predicting room occupancy”
• Patent B (Medium Relevance): “Sensor network for building automation”
• Patent C (Low Relevance): “Machine learning for image recognition”
• Patent D (Not Relevant): “Wireless communication protocol”

Criterion 2: patent legal status search

Question: Is the patent currently valid and enforceable?

Assessment Approach:

• Check patent status in the patent office database
• Verify that the patent has been granted (not just published as an application)
• Confirm that the patent has not expired
• Verify that maintenance fees have been paid (for U.S. patents)
• Check for any reexamination or post-grant review proceedings

Scoring:

• Valid and Enforceable: Patent is currently in force
• Uncertain Status: Patent status is unclear or requires further investigation
• Expired or Lapsed: Patent is no longer in force
• Not Yet Granted: Patent is still pending

Example:

• Patent A: Granted in 2015, maintenance fees paid, valid until 2035 (Valid)
• Patent B: Granted in 2010, maintenance fees not paid after 2020 (Expired)
• Patent C: Published application, not yet granted (Not Yet Granted)
• Patent D: Granted in 2018, currently in post-grant review (Uncertain)

Criterion 3: Geographic Coverage

Question: Does the patent cover jurisdictions relevant to your business?

Assessment Approach:

• Identify which countries/regions are covered by the patent
• Assess whether these jurisdictions are relevant to your business
• Consider your current and planned markets

Scoring:

• High Priority: Patent covers your primary markets (e.g., U.S., Europe)
• Medium Priority: Patent covers secondary markets
• Low Priority: Patent covers markets not relevant to your business
• Not Relevant: Patent covers only irrelevant jurisdictions

Example:

• Your primary markets: U.S., Europe, China
• Patent A: U.S. patent (High Priority)
• Patent B: European patent (High Priority)
• Patent C: Japanese patent only (Low Priority)
• Patent D: Australian patent only (Not Relevant)

Criterion 4: claim scope screening

Question: Are the patent claims broad enough to potentially cover your product?

Assessment Approach:

• Read the independent claims (the broadest claims)
• Assess whether the claims are narrow or broad
• Consider whether your product might fall within the claim scope

Scoring:

• Broad Claims: Claims are broad and might cover your product
• Moderate Claims: Claims are moderately broad
• Narrow Claims: Claims are narrow and unlikely to cover your product
• Unclear: Claim scope is unclear without detailed analysis

Example:

• Patent A: “A framework for predicting occupancy in buildings” (Broad)
• Patent B: “A machine learning framework using neural networks for occupancy prediction in residential buildings” (Moderate)
• Patent C: “A specific neural network architecture with three hidden layers for occupancy prediction” (Narrow)

Criterion 5: Patent Holder

Question: Who owns the patent, and are they likely to enforce it?

Assessment Approach:

• Identify the patent assignee (owner)
• Research the patent holder’s business and patent enforcement history
• Assess whether the patent holder is active in your industry

Scoring:

• High Enforcement Risk: Patent holder is known for enforcing patents, is a competitor, or is a non-practicing entity (NPE)
• Medium Enforcement Risk: Patent holder is active in the industry but not known for aggressive enforcement
• Low Enforcement Risk: Patent holder is not active in the industry or is unlikely to enforce
• Unknown: Patent holder’s enforcement history is unknown

Example:

• Patent A: Owned by major competitor known for patent litigation (High Risk)
• Patent B: Owned by university (Low Risk)
• Patent C: Owned by NPE known for patent licensing (High Risk)
• Patent D: Owned by company in different industry (Low Risk)

Preliminary Screening Process

Step 1: Prepare Screening Materials

Create a screening template:

• Patent number and title
• Patent holder
• Grant date and expiration date
• Technical relevance assessment
• Patent status assessment
• Geographic coverage assessment
• Claim scope assessment
• Patent holder assessment
• Overall recommendation

Organize patents for screening:

• Group patents by technology area
• Prioritize patents by apparent relevance
• Assign patents to screeners

Step 2: Conduct Screening

For each patent:

1. Read the title and abstract
2. Review the claims (at least the independent claims)
3. Scan the specification and drawings
4. Assess against screening criteria
5. Document assessment in screening template
6. Make recommendation (detailed analysis / monitor / exclude)

Time allocation:

• Title and abstract: 2-3 minutes
• Claims review: 5-10 minutes
• Specification and drawings: 5-10 minutes
• Assessment and documentation: 3-5 minutes
• Total: 15-30 minutes per patent

Step 3: Consolidate Results

Create screening summary:

• Number of patents screened
• Number recommended for detailed analysis
• Number recommended for monitoring
• Number excluded
• Key findings and observations

Identify patterns:

• Are certain patent holders more relevant than others?
• Are certain technology areas more relevant?
• Are there clusters of related patents?

Step 4: Quality Assurance

Review screening results:

• Have screeners applied criteria consistently?
• Are there any borderline cases that need reconsideration?
• Are there any obvious errors or omissions?

Conduct spot checks:

• Review a sample of excluded patents to ensure they were correctly excluded
• Review a sample of included patents to ensure they were correctly included

Preliminary Screening Output

Screening Matrix

Create a matrix documenting screening results:

Screening Report

Document your screening process and results:

• Number of patents screened
• Screening criteria applied
• Results summary
• Patents recommended for detailed analysis
• Patents recommended for monitoring
• Patents excluded
• Key observations and recommendations

Common Preliminary Screening Errors

Error 1: Screening Too Aggressively

Problem: You exclude patents that warrant detailed analysis.

Consequence: You miss relevant patents and underestimate FTO risks.

Solution: When in doubt, include the patent for detailed analysis. It’s better to analyze a few irrelevant patents than to miss a relevant one.

Error 2: Screening Too Conservatively

Problem: You include too many patents for detailed analysis, wasting resources.

Consequence: You spend excessive time and resources on irrelevant patents.

Solution: Apply screening criteria consistently and rigorously.

Error 3: Insufficient Technical Understanding

Problem: Screeners lack sufficient technical knowledge to assess relevance.

Consequence: Inconsistent and inaccurate screening results.

Solution: Involve technical experts in screening or provide screeners with technical training.

Error 4: Inconsistent Application of Criteria

Problem: Different screeners apply criteria differently.

Consequence: Inconsistent screening results.

Solution: Provide clear screening criteria and conduct quality assurance checks.

Error 5: Ignoring Patent Status

Problem: You include expired or invalid patents in detailed analysis.

Consequence: Wasted resources on patents that pose no FTO risk.

Solution: Always verify patent status before including in detailed analysis.

Real-World Example: Preliminary Screening

The Scenario: A company developing a smart home framework conducted a patent search and identified 450 potentially relevant patents.

Screening Process:

• Developed screening criteria (FTO patent screening, patent status, geographic coverage, claim scope, patent holder)
• Assigned patents to three screeners
• Each screener assessed 150 patents
• Screening took approximately 2 weeks

Results:

• 450 patents screened
• 35 patents recommended for detailed analysis (8%)
• 85 patents recommended for monitoring (19%)
• 330 patents excluded (73%)

Quality Assurance:

• Reviewed 10% of excluded patents (33 patents)
• Found 2 patents that should have been included
• Adjusted screening results accordingly

Final Results:

• 37 patents for detailed analysis
• 85 patents for monitoring
• 328 patents excluded

Outcome: The company conducted detailed analysis on 37 patents, identifying 5 high-risk patents requiring mitigation.

Best Practices for Preliminary Screening

1. Develop Clear Screening Criteria

Define specific, objective criteria for assessing patents.

2. Provide Screener Training

Ensure screeners understand the technology and screening criteria.

3. Use Screening Templates

Use consistent templates to ensure uniform documentation.

4. Conduct Quality Assurance

Review a sample of screening results to ensure consistency and accuracy.

5. Document Everything

Document your screening process, criteria, and results.

6. Involve Technical Experts

Have technical experts available to answer questions about technical relevance.

7. Err on the Side of Inclusion

When in doubt, include the patent for detailed analysis rather than excluding it.

8. Iterate and Refine

As you learn more about the patent landscape, refine your screening criteria.

Conclusion

Preliminary screening is a critical step in FTO analysis that allows you to efficiently allocate resources to the most relevant patents. By developing clear screening criteria, training screeners, and conducting quality assurance, you can:

• Identify high-priority patents for detailed analysis
• Exclude clearly irrelevant patents
• Allocate resources efficiently
• Ensure comprehensive FTO analysis

The time invested in effective preliminary screening pays dividends by enabling more focused and efficient detailed analysis.

Key Takeaway: Preliminary screening quickly identifies which patents warrant detailed analysis. Use clear criteria, train screeners, and conduct quality assurance to ensure accurate and consistent results.