Term ends Apr 28, 2040 · Medium confidence

Computed 20-year base term

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 11,592,011), so the cap could be lower.

Held by Kerr Machine Co.

Filed Feb 6, 2024 as application 18/433,703 · Granted Feb 11, 2025

Base term, 20 years from filing

Today

20 years from filing

Term ends Apr 28, 2040

2020 2040

Clock starts
Apr 28, 2020

Term ends
Apr 28, 2040

Granted
Feb 11, 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.

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 11,592,011, to Apr 28, 2040. The term already ends on or before that date, so the cap shortened nothing.

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.

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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 0 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Apr 28, 2020, when application 16/860,146, the earliest non-provisional in its chain, was filed (this one was filed Feb 6, 2024)	Apr 28, 2040	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	Disclaimer resolved from the filed document (refs US 11,592,011)	resolves to Apr 28, 2040, no earlier than this term, so no change	Medium 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	Apr 28, 2040	Medium confidence

This family

US 11,578,710	In force Jul 2040	Jul 2040
US 11,592,011	In force no later than Apr 2040	no later than Apr 2040
US 11,952,986	In force no later than Apr 2040	no later than Apr 2040
US 11,952,990	In force no later than Apr 2040	no later than Apr 2040
US 12,276,270	In force Apr 2040	Apr 2040
US 12,221,957	this patent Apr 2040	Apr 2040
US 12,473,897	In force no later than Apr 2040	no later than Apr 2040
US 12,454,944	In force no later than Apr 2040	no later than Apr 2040

8 of 13 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.

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

Apr 2040

Term ends Apr 28, 2040. Maintenance fees still fall due before then

Terminal disclaimer

A terminal disclaimer resolved from the filed document, referencing US 11,592,011, ends no earlier than this term, so it caps nothing.

Citations

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.

Fracturing Pump Arrangement Using a Plunger with an Internal Fluid Passage