Screw Compressor Rotor Profile Design Patents: Leaders, Filing Trends and Open Claim Space
Concentrated at the top. the five most active assignees hold 96 of 233 records in scope (41.2%), and the leading ten hold 139 (59.7%) — a short list of filers has shaped most of the claim space. Published records rose to a peak of 19 in 2018 before declining; the tracked interval from 2021 (16 records) to 2024 (0 records) shows a full -100% drop, though 2025 and 2026 are still incomplete due to publication lag and should not be read as a continued decline on their own.
- 1TRANE INTERNATIONAL INC32
- 2DAIKIN INDUSTRIES LTD22
- 3HITACHI LTD17
- 4JOHNSON CONTROLS TYCO IP HLDG LLP14
- 5CARRIER CORP11
See the full screw compressor rotor profile design analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on screw compressor rotor profile patents
Who holds the most patents on screw compressor rotor profile design?
One assignee leads the ranked field with 32 records, well ahead of the fifth-place company at 11 and the tenth-place company at 7. The five most active assignees together hold 41.2% of all 233 records in scope, and the leading ten hold 59.7%. That leaves a long tail of 56 further ranked companies, most holding only a handful of records each, so due diligence should prioritise the top names before scanning the tail.
Is screw compressor rotor profile design still an active area for new patent filings?
Filing activity peaked in 2018 at 19 published records and the tracked 2021-2024 window shows a full drop to zero, a -100% change. However, publication lags filing by roughly eighteen months, so the 2025-26 records in this dataset are still incomplete and should not be read as proof the field has gone quiet — it means the visible pipeline has thinned from its 2018 peak, not that filing has stopped.
What patent classes cover screw compressor rotor profile technology?
The dominant class is F04C, rotary-piston pumps, covering 84.1% of the 233 records in scope, confirming most claims sit in core compressor mechanics. Meaningful secondary coverage appears in F25B (refrigeration and heat pumps, 24.0%) and F01C (rotary-piston machines generally, 20.2%), with smaller overlaps into bearings (F16C), vibration damping (F16F) and separation processes (B01D). Because a single record can carry multiple IPC classes, these shares add up to more than 100% and should not be summed.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Screw Compressor Rotor Profile Design covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.