Term ends Sep 29, 2036 · High confidence

Computed 20-year base term

Held by Kerr Machine Co.

Filed Sep 29, 2016 as application 15/280,642 · Granted May 14, 2019

Base term, 20 years from filing

Today

20 years from filing

Term ends Sep 29, 2036

2016 2036

Clock starts
Sep 29, 2016

Term ends
Sep 29, 2036

Granted
May 14, 2019

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.

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.

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. 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 Sep 29, 2016, when this application, 15/280,642, was filed	Sep 29, 2036	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	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 10,288,178	this patent Sep 2036	Sep 2036
US 10,895,325	In force Sep 2036	Sep 2036
Application 15/955,128	Abandoned not computed	not computed
US 10,670,013	In force Sep 2038	Sep 2038
US 10,648,490	In force Jul 2038	Jul 2038
US 11,078,903	In force Aug 2038	Aug 2038
Application 16/169,663	Abandoned not computed	not computed
Application 16/216,709	Abandoned not computed	not computed

8 of 36 applications in this family shown, earliest filings first. 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 5, 2016 Reel 39947, frame 120	Nowell, Mark S.; Foster, Kelcy Jake; May, Michael Eugene; Ayres, Brandon Scott	Kerr Machine Co.	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

Sep 2036

Term ends Sep 29, 2036. Maintenance fees still fall due before then

Citations

124

later US patents cite this one

That is top 5% of utility patents granted in 2019 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.

Sealing High Pressure Flow Devices