Term ends Dec 4, 2026 · High confidence

Computed 20-year base term

Held by Esco Group LLC

Filed Jun 30, 2011 as application 13/173,254 · Granted Nov 20, 2012

Base term, 20 years from filing

Today

20 years from filing

Term ends Dec 4, 2026

2006 2026

Clock starts
Dec 4, 2006

Term ends
Dec 4, 2026

Granted
Nov 20, 2012

base term fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.

3 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. All three maintenance fees are recorded paid; no more fees are due. 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 4, 2006, when application 11/633,996, the earliest non-provisional in its chain, was filed (this one was filed Jun 30, 2011)	Dec 4, 2026	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	3 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Dec 4, 2026	High confidence

This family

US 7,730,652	In force Dec 2027	Dec 2027
US 7,997,017	In force Dec 2026	Dec 2026
US 8,312,650	this patent Dec 2026	Dec 2026

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
Jun 27, 2012 Reel 28452, frame 19	McClanahan, Robert; Briscoe, Terry L	Esco Corporation	Assignment of Assignor's Interest
Jul 3, 2012 Reel 28496, frame 848	Esco Corporation	Bank of America, N.A., as Administrative Agent	Notice of Grant of Security Interest in Patents
Jul 16, 2018 Reel 46355, frame 676	Bank Of America, N.a.	Esco Corporation	Release of Security Interest
Aug 17, 2018 Reel 46848, frame 493	Esco Corporation; Esco Group LLC	Esco Group LLC	Merger and Change of Name

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 2026

Term ends Dec 4, 2026. No further fees fall due before then

Citations

later US patents cite this one

That is above the median of utility patents granted in 2012 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.

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