Term ends Oct 22, 2035 · High confidence
20-year base term ends Oct 22, 2035
Held by Hitachi Energy Ltd.
Filed Dec 10, 2019 as application 16/709,181 · Granted Feb 27, 2024
Base term plus 1113 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2035
Clock starts
Oct 22, 2015
Oct 22, 2015
Term ends
Oct 22, 2035
Oct 22, 2035
Granted
Feb 27, 2024
Feb 27, 2024
base term
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
1,113
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,679,787.
0 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
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 1113 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 0 of 2 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 Oct 22, 2015, when application 14/919,956, the earliest non-provisional in its chain, was filed (this one was filed Dec 10, 2019) | Oct 22, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1113 days, USPTO patent term adjustment record | Nov 8, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,679,787) | capped to Oct 22, 2035 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 22, 2035 | High confidence |
This family
| Application 62/068,495 | Provisional application no patent term | no patent term |
| US 10,431,375 | In force Aug 2038 | Aug 2038 |
| US 10,543,511 | In force Sep 2036 | Sep 2036 |
| US 10,832,859 | In force Oct 2035 | Oct 2035 |
| US 10,679,787 | In force Oct 2035 | Oct 2035 |
| US 11,914,057 | this patent Oct 2035 | Oct 2035 |
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 |
|---|---|---|---|
| Dec 31, 2021 Reel 58601, frame 692 | ABB Power Grids Switzerland AG | Hitachi Energy Switzerland AG | Change of Name |
| May 26, 2022 Reel 60026, frame 330 | Frimpong, George K.; Colmenero, Alberto Prieto | ABB Schweiz AG | Assignment of Assignor's Interest |
| May 26, 2022 Reel 60026, frame 536 | ABB Schweiz AG | ABB Power Grids Switzerland AG | Assignment of Assignor's Interest |
| May 26, 2022 Reel 60026, frame 741 | Pitois, Claire | Hitachi Energy Switzerland AG | Assignment of Assignor's Interest |
| Nov 13, 2023 Reel 65548, frame 869 | Hitachi Energy Switzerland AG | Hitachi Energy Ltd. | Merger |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Oct 2035
Term ends Oct 22, 2035. Maintenance fees still fall due before then
Note
The 1113 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,679,787.
Citations
3
later US patents cite this one
Fewer than half of the utility patents granted in 2024 in our data have been cited yet, so we show the count and do not rank on it.
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.