Term ends Dec 21, 2043 · High confidence
20-year base term ends Oct 10, 2043
Held by Hydra-Stop LLC
Filed Oct 10, 2023 as application 18/484,115 · Granted Mar 17, 2026
Base term plus 72 days of patent term adjustment (USPTO delay)
Today
2023
2043
Clock starts
Oct 10, 2023
Oct 10, 2023
Term ends
Dec 21, 2043
Dec 21, 2043
Granted
Mar 17, 2026
Mar 17, 2026
base term
patent term adjustment
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
72
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
3
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 72 days past its 20-year base term on 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 Oct 10, 2023, when this application, 18/484,115, was filed | Oct 10, 2043 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +72 days, USPTO patent term adjustment record | Dec 21, 2043 | 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 | Dec 21, 2043 | High confidence |
This family
| US 12,578,050 | this patent Dec 2043 | Dec 2043 |
| Application 19/301,050 | Pending not computed | not computed |
| Application 19/301,044 | 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 |
|---|---|---|---|
| Oct 10, 2023 Reel 65173, frame 614 | Stolson, Andrew J.; Geppert, Cullen; Choi, Ariel; Smrha, Nathan | Hydra-Stop LLC | Assignment of Assignor's Interest |
| Oct 3, 2024 Reel 69107, frame 331 | E.J. Brooks Company; Hydra-Stop LLC; Task Force Tips LLC; Reelcraft Industries, Inc.; Innovative Rescue Systems LLC | Wells Fargo Bank, National Association, as Collateral Agent | Patent Security Agreement |
| Sep 29, 2025 Reel 72978, frame 344 | Wells Fargo Bank, National Association, as Collateral Agent | Hydra-Stop LLC | First Lien Partial Release of Security Interest in Patents, Recorded on October 3, 2024 at Reel 069107 Frame 0331 |
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
Dec 2043
Term ends Dec 21, 2043. Maintenance fees still fall due before then
Note
The 72 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.