3,404 patents currently held
193 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
451 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
184
Ending by 2030
Nov 2026
Next term end
3,056
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends May 2034 · Medium confidence
Also notable
Ends Feb 2040 · High confidence
Also notable
Ends Aug 2040 · High confidence
Trans-Critical Vapor Cycle System with Improved Heat Rejection
US 10,288,325
Cited by 44 later US patents, top 5% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2034.
Gas Turbine Engine Compression System
US 11,242,155
Cited by 19 later US patents, top 5% of utility patents granted in 2022 in our data. Protection runs to 2040.
Gearboxes for Aircraft Gas Turbine Engines
US 10,982,563
Cited by 14 later US patents, top 25% of utility patents granted in 2021 in our data. Protection runs to 2040.
Formerly held, still cited
Notable
Ends Jun 2036 · High confidence
Cited by 19 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2036.
now held by Rolls-Royce North America Technologies, Inc.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 13 fees due Nov 14 to 30, 2026 · next Nov 14
- 62 fees due Dec 2 to 30, 2026 · next Dec 2
- 69 fees due Jan 2 to 30, 2027 · next Jan 2
- 77 fees due Feb 1 to 28, 2027 · next Feb 1
- 77 fees due Mar 1 to 29, 2027 · next Mar 1
- 81 fees due Apr 1 to 30, 2027 · next Apr 1
- 68 fees due May 3 to 28, 2027 · next May 3
- 55 fees due Jun 1 to 30, 2027 · next Jun 1
- 59 fees due Jul 2 to 30, 2027 · next Jul 2
- 52 fees due Aug 2 to 27, 2027 · next Aug 2
- 67 fees due Sep 3 to 30, 2027 · next Sep 3
- 75 fees due Oct 2 to 30, 2027 · next Oct 2
- 21 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Oct 30Assignment recorded on 1 record: Smith, Alistair J E and 3 others to Rolls-Royce PLC Recorded Oct 30, 2026, executed Oct 17, 2023. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76573, frame 606.
- Oct 30Assignment recorded on 1 record: Murray, Christopher A. to Rolls-Royce PLC Recorded Oct 30, 2026, executed Apr 20, 2023. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76578, frame 635.
- 62 of the patents on this record were granted since Aug 16, 2026
- 37 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 3,056 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Method for Generating a Gas Which May Be Used for Startup and Shutdown of a Fuel Cell | 10 in force | to Jun 2034 |
| Fuel Injector with First and Second Converging Fuel-Air Passages | 9 in force | to Feb 2037 |
| Endoscope System | 9 in force | to Dec 2036 |
| High Power Epicyclic Gearbox and Operation Thereof | 7 in force | to Apr 2040 |
| Super-Cooled Ice Impact Protection for a Gas Turbine Engine | 7 in force | to Nov 2039 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,651,019 | Process and Apparatus for Friction Welding In force · High confidence | In force | High confidence | |
| US 7,744,276 | Sensor Measurement Error In force · High confidence | In force | High confidence | |
| US 7,500,347 | Variable Geometry Combustor In force · High confidence | In force | High confidence | |
| US 7,510,793 | Post-Reformer Treatment of Reformate Gas In force · High confidence | In force | High confidence | |
| US 7,557,481 | Rotor for an Electrical Machine In force · High confidence | In force | High confidence | |
| US 7,621,716 | Turbine Case Cooling In force · High confidence | In force | High confidence | |
| US 7,528,324 | Lead In force · High confidence | In force | High confidence | |
| US 7,665,964 | Turbine In force · High confidence | In force | High confidence | |
| US 7,503,748 | Mounting Arrangement for Turbine Blades In force · High confidence | In force | High confidence | |
| US 7,507,071 | Cooling Arrangement In force · High confidence | In force | High confidence |
Also on record, not counted in the 3,404: 193 patents in force now held by others · 1,344 patents ended · 398 applications pending · 1,315 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.