Term ends May 30, 2039 · High confidence
20-year base term ends May 30, 2039
Held by Hydrow, Inc.
Filed Jan 11, 2024 as application 18/410,543 · Granted Jan 7, 2025
Base term, 20 years from filing
Today
2019
2039
Clock starts
May 30, 2019
May 30, 2019
Term ends
May 30, 2039
May 30, 2039
Granted
Jan 7, 2025
Jan 7, 2025
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
5
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. 0 of 3 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 May 30, 2019, when application 16/426,347, the earliest non-provisional in its chain, was filed (this one was filed Jan 11, 2024) | May 30, 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 30, 2039 | High confidence |
This family
| US 10,828,531 | In force May 2039 | May 2039 |
| Application PCT/US2020/032132 | PCT application no patent term | no patent term |
| US 11,904,200 | In force Dec 2039 | Dec 2039 |
| US 12,186,622 | this patent May 2039 | May 2039 |
| US 12,779,278 | In force Sep 2039 | Sep 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 |
|---|---|---|---|
| Jan 11, 2024 Reel 66105, frame 275 | Smith, Bruce | Hydrow, Inc. | Assignment of Assignor's Interest |
| Jan 11, 2024 Reel 66105, frame 337 | Renner, Klaus Heribert; Taliaferro Burke, William Churchill; Mur-miranda, Jose Oscar; Evans, Christopher Olin | Cooper Perkins, Inc. | Assignment of Assignor's Interest |
| Jan 11, 2024 Reel 66105, frame 365 | Cooper Perkins, Inc. | Hydrow, Inc. | Assignment of Assignor's 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
May 2039
Term ends May 30, 2039. Maintenance fees still fall due before then
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 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.