Term ends Sep 29, 2036 · High confidence
20-year base term ends Dec 23, 2034
Held by Proserv Gilmore Valve LLC
Filed Dec 23, 2014 as application 14/580,419 · Granted May 29, 2018
Base term plus 646 days of patent term adjustment (USPTO delay)
Today
2014
2036
Clock starts
Dec 23, 2014
Dec 23, 2014
Term ends
Sep 29, 2036
Sep 29, 2036
Granted
May 29, 2018
May 29, 2018
base term
patent term adjustment
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
646
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
2
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 646 days past its 20-year base term on prosecution delay. 2 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 Dec 23, 2014, when this application, 14/580,419, was filed | Dec 23, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +646 days, USPTO patent term adjustment record | Sep 29, 2036 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 29, 2036 | High confidence |
This family
| US 9,982,511 | this patent Sep 2036 | Sep 2036 |
| US 10,584,561 | In force Dec 2034 | Dec 2034 |
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 |
|---|---|---|---|
| Jul 8, 2015 Reel 36020, frame 768 | Weintraub, Preston; Quackenbush, Joseph | Proserv Operations, Inc. | Assignment of Assignor's Interest |
| Mar 8, 2018 Reel 45147, frame 155 | Proserv Gilmore Valve LLC | Cortland Capital Market Services LLC | Security Interest |
| Mar 8, 2018 Reel 45538, frame 279 | HSBC Bank USA, National Association | Proserv Operations, Inc. | Termination and Release of Security Interest in Patent Collateral |
| Mar 9, 2018 Reel 45163, frame 803 | Proserv Operations, Inc. | Proserv Gilmore Holdings LLC | Assignment of Assignor's Interest |
| Mar 9, 2018 Reel 45163, frame 812 | Proserv Gilmore Holdings LLC | Proserv Gilmore Valve LLC | Assignment of Assignor's Interest |
| Mar 20, 2018 Reel 45662, frame 200 | UBS AG, Stamford Branch | Riverstone V Acquisition Holdings Ltd. | Assignment of Patent Security Agreement |
| Mar 22, 2018 Reel 45663, frame 904 | Riverstone V Acquisition Holdings Ltd. | Proserv Operations, Inc. | Termination and Release of Security Interest in Patent Collateral |
| May 8, 2018 Reel 46113, frame 559 | Cortland Capital Market Services LLC | Proserv Gilmore Valve LLC | Release of Security Interest at Reel/Frame 045147/0155 |
| Jan 18, 2019 Reel 48097, frame 345 | Proserv Gilmore Valve LLC | HSBC Corporate Trustee Company (UK) Limited, as Collateral Agent | Patent Short Form Security Agreement |
| Jun 8, 2022 Reel 60134, frame 602 | HSBC Corporate Trustee Company (UK) Limited, as Collateral Agent | Proserv Gilmore Valve 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
Sep 2036
Term ends Sep 29, 2036. Maintenance fees still fall due before then
Note
The 646 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
19
later US patents cite this one
That is top 25% of utility patents granted in 2018 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.