Term ends Aug 29, 2033 · High confidence
20-year base term ends Jan 9, 2032
Held by Eht Ventures LLC
Filed Jan 9, 2012 as application 13/345,906 · Granted Feb 24, 2015
Base term plus 598 days of patent term adjustment (USPTO delay)
Today
2012
2033
Clock starts
Jan 9, 2012
Jan 9, 2012
Term ends
Aug 29, 2033
Aug 29, 2033
Granted
Feb 24, 2015
Feb 24, 2015
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
598
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.
7
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 598 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 9, 2012, when this application, 13/345,906, was filed | Jan 9, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +598 days, USPTO patent term adjustment record | Aug 29, 2033 | 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 | Aug 29, 2033 | High confidence |
This family
| US 8,963,377 | this patent Aug 2033 | Aug 2033 |
| US 9,601,283 | In force Jan 2032 | Jan 2032 |
| US 10,389,345 | In force Jan 2032 | Jan 2032 |
| US 11,095,280 | In force Jan 2032 | Jan 2032 |
| US 11,979,141 | In force Jan 2032 | Jan 2032 |
| US 12,726,191 | In force Jan 2032 | Jan 2032 |
| Application 19/735,487 | Pending not computed | not computed |
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 |
|---|---|---|---|
| Mar 23, 2012 Reel 27917, frame 155 | Ziemba, Timothy; Miller, Kenneth E.; Carscadden, John G.; Prager, James | Eagle Harbor Technologies Inc. | Assignment of Assignor's Interest |
| Oct 17, 2023 Reel 65259, frame 258 | Eagle Harbor Technologies, Inc. | Eht Ventures LLC | Assignment of Assignor's Interest |
| Feb 5, 2025 Reel 70117, frame 660 | Eagle Harbor Technologies, Inc. | U.S. Department of Energy | Confirmatory License |
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 2033
Term ends Aug 29, 2033. No further fees fall due before then
Note
The 598 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
176
later US patents cite this one
That is top 5% of utility patents granted in 2015 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.