Oxide and Garnet Electrolyte Patents: Who Leads and Where Claims Remain Open
51.8% of all 753 records sit with just five assignees — the leader alone accounts for 171 records, well ahead of fifth place at 30. Filings rose from 54 in 2017 to a peak of 95 in 2023, with 2021's 79 records climbing to 82 by 2024 — a 4% gain across that span. 2025 and 2026 counts are still low in the chart because publication lags filing by roughly 18 months; treat the tail as incomplete rather than as a slowdown.
- 1QUANTUMSPACE BATTERY INC171
- 2TOYOTA JIDOSHA KK99
- 3CORNING INC59
- 4SAMSUNG ELECTRONICS CO LTD31
- 5UNIV OF MARYLAND30
See the full oxide and garnet electrolytes 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 oxide and garnet electrolyte patents
Who holds the most patents on garnet electrolyte technology?
One assignee leads clearly with 171 of the 753 records in this dataset, more than five times the count at fifth place (30 records). The top five assignees combined hold 390 records, or 51.8% of the field, and the top ten hold 487 records (64.7%). That level of concentration means a new entrant should expect to design around a small set of well-established composition and processing claims rather than finding open ground at the core of garnet chemistry.
Is filing activity in oxide and garnet electrolytes still growing?
Yes, though modestly: complete-year data shows 79 records in 2021 rising to 82 in 2024, a 4% increase, with a peak of 95 records in 2023. Counts for 2025 and 2026 appear lower in the raw trend, but that is expected — publication typically lags filing by around 18 months, so the most recent one to two years are undercounted and should not be read as a slowdown.
What does US20180277827A1 actually cover?
This Toyota filing covers a method for producing a sintered electrode that pairs a lithium-containing composite oxide cathode with lithium lanthanum zirconate (LLZO) as the oxide solid electrolyte. The claimed process laminates a cathode mixture with a separately prepared LLZO-plus-lithium-salt mixture, then heats the laminate to sinter the electrolyte layer, using a lower-melting-point lithium salt to aid densification. It is a process claim on co-sintering and lamination rather than a composition-only claim, which matters for anyone trying to design around it by changing electrolyte chemistry alone.
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 Oxide and Garnet Electrolytes 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.