Term ends Oct 28, 2031 · High confidence
20-year base term ends Nov 30, 2030
Held by Wattmore, Inc.
Filed Nov 30, 2010 as application 12/956,955 · Granted Apr 23, 2013
Base term plus 332 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Nov 30, 2010
Nov 30, 2010
Term ends
Oct 28, 2031
Oct 28, 2031
Granted
Apr 23, 2013
Apr 23, 2013
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
332
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.
This patent's term runs 332 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 Nov 30, 2010, when this application, 12/956,955, was filed | Nov 30, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +332 days, USPTO patent term adjustment record | Oct 28, 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 | 3 of 3 maintenance fees paid | In force (reinstated) | High confidence |
| Computed term end | The steps above, in order | Oct 28, 2031 | High confidence |
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 |
|---|---|---|---|
| Dec 28, 2010 Reel 25544, frame 290 | Plett, Gregory L. | American Electric Vehicles, Inc. | Assignment of Assignor's Interest |
| Jul 6, 2017 Reel 42926, frame 651 | American Electric Vehicles, Inc. | Rivers & Johnson Aev, Inc. | Nunc Pro Tunc Assignment |
| Jul 6, 2017 reel/frame not recorded | Rivers & Johnson Aev, Inc. | Rivers, Daniel D. | Nunc Pro Tunc Assignment |
| Jul 6, 2017 reel/frame not recorded | Rivers & Johnson Aev, Inc. | Johnson, Bruce G. | Nunc Pro Tunc Assignment |
| Jul 6, 2017 Reel 42926, frame 717 | Rivers & Johnson Aev, Inc. | Rivers, Daniel D.; Johnson, Bruce G. | Nunc Pro Tunc Assignment |
| Aug 10, 2017 Reel 43260, frame 608 | Rivers, Daniel D.; Johnson, Bruce G. | Nikola, LLC | Assignment of Assignor's Interest |
| Jan 10, 2018 Reel 45039, frame 963 | University of Colorado | Nikola LLC | Assignment of Assignor's Interest |
| Nov 1, 2024 Reel 69112, frame 366 | Nikola LLC | Nikola Power Corp. | Change of Name |
| Nov 1, 2024 Reel 69112, frame 400 | Nikola Power Corp. | Wattmore, Inc. | Change of Name |
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 2031
Term ends Oct 28, 2031. No further fees fall due before then
Note
The 332 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
37
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.