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 Mar 2029 · High confidence
Also notable
Ends Aug 2032 · High confidence
Also notable
Ends Jan 2032 · Low confidence
Coupling System for a Star Gear Train in a Gas Turbine Engine
US 8,585,538
Cited by 349 later US patents, top 1% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
Geared Turbofan Gas Turbine Engine Architecture
US 10,794,292
Cited by 84 later US patents, top 5% of utility patents granted in 2020 in our data. Protection runs to 2032.
Flexible Support Structure for a Geared Architecture Gas Turbine Engine
US 11,021,996
Cited by 50 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2032. A terminal disclaimer caps this term to an earlier patent's.
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.
- 10 fees due Nov 14 to 28, 2026 · next Nov 14
- 178 fees due Dec 2 to 30, 2026 · next Dec 2
- 156 fees due Jan 2 to 30, 2027 · next Jan 2
- 214 fees due Feb 1 to 28, 2027 · next Feb 1
- 192 fees due Mar 1 to 29, 2027 · next Mar 1
- 237 fees due Apr 1 to 30, 2027 · next Apr 1
- 167 fees due May 3 to 28, 2027 · next May 3
- 166 fees due Jun 1 to 30, 2027 · next Jun 1
- 134 fees due Jul 2 to 30, 2027 · next Jul 2
- 153 fees due Aug 2 to 27, 2027 · next Aug 2
- 185 fees due Sep 1 to 30, 2027 · next Sep 1
- 148 fees due Oct 2 to 30, 2027 · next Oct 2
- 77 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Nov 4Assignment recorded on 1 record: Binek, Lawrence to RTX Corporation Recorded Nov 4, 2026, executed Aug 1, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76628, frame 572.
- Nov 4Assignment recorded on US 12,712,289: RTX Corporation to Rockwell Collins, Inc. Recorded Nov 4, 2026, executed Oct 27, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76630, frame 156.
- 171 of the patents on this record were granted since Aug 16, 2026
- 62 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 7,334 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Flexible Support Structure for a Geared Architecture Gas Turbine Engine | 25 in force | to May 2033 |
| Gas Turbine Engine with High Speed Low Pressure Turbine Section and Bearing Support Features | 22 in force | to Jan 2033 |
| Protected Wireless Network | 14 in force | to Mar 2036 |
| Engine Mounting Configuration for a Turbofan Gas Turbine Engine | 14 in force | to Mar 2032 |
| Engine Mount System for a Turbofan Gas Turbine Engine | 13 in force | to Sep 2031 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,440,853 | Systems and Methods for Detecting Shallow Buried Objects held by RTX BBN Technologies, Inc. In force · High confidence | In force | High confidence | |
| US 7,435,283 | Modular Fuel Stabilization System In force · High confidence | In force | High confidence | |
| US 7,376,471 | System and Method for Exploiting a Good Starting Guess for Binding Constraints in Quadratic Programming with an Infeasible and Inconsistent Starting Guess for the Solution In force · High confidence | In force | High confidence | |
| US 7,384,522 | Ergonomic Loading Apparatus for Electroplating Processes In force · High confidence | In force | High confidence | |
| US 8,511,435 | Lubrication System with Extended Emergency Operability In force · High confidence | In force | High confidence | |
| US 8,517,148 | Lubrication System with Tolerance for Reduced Gravity In force · High confidence | In force | High confidence | |
| US 7,465,336 | Fuel Deoxygenation System with Non-Planar Plate Members In force · Medium confidence | In force | Medium confidence | |
| US 7,754,016 | Multiple Axis Tumbler Coating Apparatus In force · High confidence | In force | High confidence | |
| US 7,445,432 | Enhanced Serpentine Cooling with U-Shaped Divider Rib In force · High confidence | In force | High confidence | |
| US 7,513,745 | Advanced Turbulator Arrangements for Microcircuits In force · High confidence | In force | High confidence |
Also on record, not counted in the 8,992: 63 patents in force now held by others · 725 patents ended · 1,013 applications pending · 319 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.