Also listed on Searete LLC, a limited liability corporation of the State of Delaware, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 23, 2036 · High confidence
20-year base term ends Feb 18, 2030
Held by Terrapower, LLC
Filed Feb 18, 2010 as application 12/660,025 · Granted Jan 14, 2020
Base term plus 2378 days of patent term adjustment (USPTO delay)
Today
2010
2036
Clock starts
Feb 18, 2010
Feb 18, 2010
Term ends
Aug 23, 2036
Aug 23, 2036
Granted
Jan 14, 2020
Jan 14, 2020
base term
patent term adjustment
fee events
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
2,378
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
11
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 2378 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Feb 18, 2010, when this application, 12/660,025, was filed | Feb 18, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2378 days, USPTO patent term adjustment record | Aug 23, 2036 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 23, 2036 | High confidence |
This family
| US 10,535,437 | this patent Aug 2036 | Aug 2036 |
| US 9,761,337 | In force Jan 2036 | Jan 2036 |
| US 9,748,007 | In force May 2035 | May 2035 |
| US 9,728,288 | In force Dec 2034 | Dec 2034 |
| Application PCT/US2011/000302 | PCT application no patent term | no patent term |
| Application PCT/US2011/000297 | PCT application no patent term | no patent term |
| Application PCT/US2011/000303 | PCT application no patent term | no patent term |
| Application PCT/US2011/000304 | PCT application no patent term | no patent term |
8 of 11 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 11, 2010 Reel 24366, frame 929 | Hyde, Roderick A; Ishikawa, Muriel Y; Tegreene, Clarence T; Walter, Joshua C; Wood, Lowell L, JR; Wood, Victoria Y.h. | Searete LLC | Assignment of Assignor's Interest |
| Apr 24, 2014 Reel 32754, frame 810 | Searete LLC | Terrapower, LLC | Assignment of Assignor's Interest |
| Aug 31, 2021 Reel 57347, frame 226 | Hyde, Roderick A.; Ishikawa, Muriel Y.; Tegreene, Clarence T.; Walter, Joshua C.; Wood, Lowell L., JR.; Wood, Victoria Y.h. | Searete, LLC | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Aug 2036
Term ends Aug 23, 2036. Maintenance fees still fall due before then
Note
The 2378 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
later US patents cite this one
That is above the median of utility patents granted in 2020 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.