Term ends Oct 24, 2028 · High confidence
20-year base term ends Jan 4, 2028
Held by Upstart Power, Inc.
Filed Jan 4, 2008 as application 12/006,688 · Granted Jun 12, 2012
Base term plus 294 days of patent term adjustment (USPTO delay)
Today
2008
2028
Clock starts
Jan 4, 2008
Jan 4, 2008
Term ends
Oct 24, 2028
Oct 24, 2028
Granted
Jun 12, 2012
Jun 12, 2012
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
294
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
2
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 294 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Jan 4, 2008, when this application, 12/006,688, was filed | Jan 4, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +294 days, USPTO patent term adjustment record | Oct 24, 2028 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 24, 2028 | High confidence |
This family
| US 8,197,976 | this patent Oct 2028 | Oct 2028 |
| Application PCT/US2009/000004 | PCT application no patent term | no patent term |
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 |
|---|---|---|---|
| Jun 30, 2008 Reel 21168, frame 940 | Poshusta, Joseph C.; Kulprathipanja, Ames; Martin, Christine M.; Martin, Jerry L. | Protonex Technology Corporation | Assignment of Assignor's Interest |
| Mar 11, 2013 Reel 29964, frame 733 | Protonex Technology Corporation | Windsail Capital III, LLC | Security Agreement |
| Mar 11, 2013 Reel 30062, frame 501 | Protonex Technology Corporation | Silicon Valley Bank | Assignment of Assignor's Interest |
| May 21, 2015 Reel 35748, frame 937 | Protonex Technology Corporation | Silicon Valley Bank | Security Agreement |
| Sep 28, 2015 Reel 36700, frame 203 | Silicon Valley Bank | Protonex Technology Corporation | Release of Security Interest |
| Oct 1, 2015 Reel 36742, frame 604 | Windsail Capital III, LLC | Protonex Technology Corporation | Release of Security Interest |
| Dec 21, 2018 Reel 47841, frame 877 | Protonex Technology Corporation | Upstart Power, Inc. | Assignment of Assignor's Interest |
| Jan 13, 2020 Reel 51497, frame 597 | Upstart Power, Inc. | Windsail Capital Fund, L.p. | Security Interest |
| Apr 13, 2021 Reel 55899, frame 517 | Windsail Capital Fund, L.p. | Upstart Power, Inc. | Release of Security 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
Oct 2028
Term ends Oct 24, 2028. No further fees fall due before then
Note
The 294 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
13
later US patents cite this one
That is above the median of utility patents granted in 2012 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.