Term ends Jun 6, 2039 · High confidence
20-year base term ends Jun 6, 2039
Held by Flexgen Power Systems, LLC
Filed Sep 18, 2020 as application 16/982,454 · Granted May 17, 2022
Base term, 20 years from filing
Today
2019
2039
Clock starts
Jun 6, 2019
Jun 6, 2019
Term ends
Jun 6, 2039
Jun 6, 2039
Granted
May 17, 2022
May 17, 2022
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
4
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 is its 20-year base term, with no adjustment for 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 Jun 6, 2019, when application PCT/US2019/035838, the earliest non-provisional in its chain, was filed (this one was filed Sep 18, 2020) | Jun 6, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Jun 6, 2039 | High confidence |
This family
| Application PCT/US2019/035838 | PCT application no patent term | no patent term |
| US 11,336,111 | this patent Jun 2039 | Jun 2039 |
| US 11,843,278 | In force Jun 2039 | Jun 2039 |
| US 12,212,181 | In force Jun 2039 | Jun 2039 |
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 |
|---|---|---|---|
| Oct 7, 2020 Reel 53993, frame 397 | Beaston, Virgil Lee | Powin Energy Corporation | Assignment of Assignor's Interest |
| Apr 23, 2021 Reel 56024, frame 524 | Powin Energy Corporation | Powin, LLC | Assignment of Assignor's Interest |
| Jan 3, 2022 Reel 58524, frame 848 | Powin, LLC | HSBC Bank USA, N.A., as Administrative Agent | Security Interest |
| Jan 13, 2022 Reel 58652, frame 252 | Arroyo Energy Investment Partners LLC | Powin Energy Corporation | Release of Security Interest |
| Oct 23, 2023 Reel 65310, frame 290 | HSBC Bank USA, N.A., as Administrative Agent | Powin, LLC | Release of Security Interest |
| Oct 2, 2024 Reel 69102, frame 539 | Powin, LLC | Glas USA LLC, as Collateral Agent | Notice of Security Interest in Intellectual Property |
| Sep 24, 2025 Reel 72946, frame 629 | Powin, LLC | Flexgen Power Systems, LLC | Assignment of Assignor's Interest |
| Oct 10, 2025 Reel 72535, frame 800 | Powin, LLC, et Al, Debtors, via U.S. Bankruptcy Court, District of New Jersey | Flexgen Power Systems, LLC | 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
Jun 2039
Term ends Jun 6, 2039. Maintenance fees still fall due before then
Citations
20
later US patents cite this one
That is top 5% of utility patents granted in 2022 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.