Term ends Aug 25, 2031 · High confidence
20-year base term ends Nov 28, 2026
Held by Terrapower, LLC
Filed Feb 12, 2008 as application 12/069,907 · Granted Mar 1, 2016
Base term plus 1731 days of patent term adjustment (USPTO delay)
Today
2006
2031
Clock starts
Nov 28, 2006
Nov 28, 2006
Term ends
Aug 25, 2031
Aug 25, 2031
Granted
Mar 1, 2016
Mar 1, 2016
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
1,731
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
23
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 1731 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are 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 Nov 28, 2006, when applications 11/605,848, 11/605,933 and 11/605,943, the earliest non-provisional applications in its chain, were filed (this one was filed Feb 12, 2008) | Nov 28, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1731 days, USPTO patent term adjustment record | Aug 25, 2031 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 25, 2031 | High confidence |
This family
| US 7,860,207 | In force Apr 2029 | Apr 2029 |
| Application 11/605,943 | Abandoned not computed | not computed |
| Application 11/605,933 | Abandoned not computed | not computed |
| Application PCT/US2007/024392 | PCT application no patent term | no patent term |
| Application PCT/US2007/024375 | PCT application no patent term | no patent term |
| Application PCT/US2007/024445 | PCT application no patent term | no patent term |
| US 9,275,759 | this patent Aug 2031 | Aug 2031 |
| US 9,230,695 | In force Dec 2033 | Dec 2033 |
8 of 23 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 |
|---|---|---|---|
| Apr 25, 2008 Reel 20891, frame 323 | Ahlfeld, Charles E.; Gilleland, John Rogers; Hyde, Roderick A.; Ishikawa, Muriel Y.; McAlees, David G.; Myhrvold, Nathan P.; Whitmer, Charles; Wood, Lowell L., JR. | Searete LLC | Assignment of Assignor's Interest |
| May 4, 2010 Reel 24330, frame 874 | Odedra, Ashok | Searete LLC | Assignment of Assignor's Interest |
| Apr 24, 2014 Reel 32746, frame 706 | The Invention Science Fund I LLC | Terrapower, LLC | Assignment of Assignor's Interest |
| Feb 26, 2015 Reel 35037, frame 550 | Searete LLC | Terrapower, 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.
What's changing
Aug 2031
Term ends Aug 25, 2031. Maintenance fees still fall due before then
Note
The 1731 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
12
later US patents cite this one
That is above the median of utility patents granted in 2016 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.