Terrapower, LLC
8 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.
21
Ending by 2030
Nov 2026
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
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.
- 1 fee due Nov 28, 2026The maintenance fee for Nuclear fission igniter (US 10,304,572) comes due Nov 28, 2026. Unpaid by May 28, 2027, it lapses early.
- 3 fees due Dec 4 to 18, 2026 · next Dec 4
- 4 fees due Feb 15, 2027
- 2 fees due Mar 5 to 10, 2027 · next Mar 5
- 7 fees due Apr 3 to 24, 2027 · next Apr 3
- 2 fees due May 10 to 17, 2027 · next May 10
- 4 fees due Jun 3 to 12, 2027 · next Jun 3
- 3 fees due Jul 5 to 23, 2027 · next Jul 5
- 5 fees due Aug 6 to 23, 2027 · next Aug 6
- 3 fees due Sep 1 to 17, 2027 · next Sep 1
- 3 fees due Oct 2 to 28, 2027 · next Oct 2
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,912,171 | Method and System for Providing Fuel in a Nuclear Reactor In force · High confidence | In force | High confidence | |
| US 8,126,106 | Method and System for Providing Fuel in a Nuclear Reactor In force · High confidence | In force | High confidence | |
| US 10,706,979 | Controlling Spatial Position of a Propagating Nuclear Fission Deflagration Wave Within a Burning Wavefront Heat Generating Region In force · High confidence | In force | High confidence | |
| US 9,305,669 | Controllable Long Term Operation of a Nuclear Reactor In force · High confidence | In force | High confidence | |
| US 8,971,474 | Automated nuclear power reactor for long-term operation In force · High confidence | In force | High confidence | |
| US 9,831,004 | Controllable long term operation of a nuclear reactor In force · High confidence | In force | High confidence | |
| US 10,304,572 | Nuclear fission igniter In force · From the USPTO record | In force | From the USPTO record | |
| US 9,011,613 | System and method for annealing nuclear fission reactor materials In force · From the USPTO record | In force | From the USPTO record | |
| US 7,860,207 | Method and System for Providing Fuel in a Nuclear Reactor In force · High confidence | In force | High confidence | |
| US 8,320,513 | Nuclear Fission Reactor, Flow Control Assembly, Methods Therefor and a Flow Control Assembly System In force · High confidence | In force | High confidence |
Also on record, not counted in the 151: 8 patents in force now held by others · 16 lapsed for an unpaid fee. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
12 pending · 23 abandoned · 3 no status recorded