Lapsed Sep 13, 2023 on the fee record · High confidence

Computed 20-year base term

Third maintenance fee unpaid; grace period ended.

No current holder resolved from the recorded chain.

Filed Jan 13, 2010 as application 12/657,062 · Granted Sep 13, 2011

Base term, 20 years from filing

Today

Lapsed Sep 13, 2023

2006 2026

Clock starts
Feb 21, 2006

No longer in force
Sep 13, 2023

Granted
Sep 13, 2011

Term would have run to
Feb 21, 2026

base term after the term ends 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.

Its term would have run to Feb 21, 2026: its 20-year base term, with no adjustment for prosecution delay. 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 Feb 21, 2006, when application 11/358,626, the earliest non-provisional in its chain, was filed (this one was filed Jan 13, 2010)	Feb 21, 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	2 of 3 maintenance fees paid	lapsed Sep 13, 2023	High confidence
Computed term end	The steps above, in order	Sep 13, 2023	High confidence

This family

US 7,886,872	In force Jan 2029	Jan 2029
US 10,208,538	In force Jan 2029	Jan 2029
US 8,016,078	this patent Sep 2023	Sep 2023
US 8,944,213	Term ended Feb 2026	Feb 2026
US 10,697,239	Term ended Feb 2026	Feb 2026
Application 16/272,739	Abandoned 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
Apr 29, 2011 Reel 26200, frame 981	Werner Co.	Bank of America, N.A., as Administrative Agent	Security Agreement
Jul 24, 2017 Reel 43318, frame 824	Bank of America, N.A., as Administrative Agent	Werner Co.	Release of Security Interest in Intellectual Property Collateral
Jul 24, 2017 Reel 43318, frame 877	Werner Co.	Bank of America, N.A., as Administrative Agent	Release of Security Interest in Intellectual Property Collateral
Jul 25, 2017 Reel 43327, frame 956	Knaack LLC; Werner Co.; Werner Technologies, Inc.	JPMorgan Chase Bank, N.A., as Collateral Agent in Respect of the ABL Credit Agreement	Patent Security Agreement (ABL)
Jul 25, 2017 Reel 43328, frame 1	Knaack LLC; Werner Co.; Werner Technologies, Inc.	JPMorgan Chase Bank, N.A., as Collateral Agent in Respect of the Term Loan Credit Agreement	Patent Security Agreement (TERM Loan)
Jun 12, 2023 Reel 63958, frame 740	Werner Co.	Wilmington Trust, National Association, as Notes Collateral Agent	Security Interest
Jun 12, 2023 Reel 63957, frame 231	JPMorgan Chase Bank, N.A., as Collateral Agent	Knaack LLC; Werner Co.; Werner Technologies, Inc.	Release of Security Interest in Patents at R/F 043328/0001
Jun 12, 2023 reel/frame not recorded	JPMorgan Chase Bank, N.A., as Collateral Agent	Knaack LLC	Release of Security Interest in Patents at R/F 043328/0001
Jun 12, 2023 reel/frame not recorded	JPMorgan Chase Bank, N.A., as Collateral Agent	Werner Co.	Release of Security Interest in Patents at R/F 043328/0001
Jun 12, 2023 reel/frame not recorded	JPMorgan Chase Bank, N.A., as Collateral Agent	Werner Technologies, Inc.	Release of Security Interest in Patents at R/F 043328/0001
Jun 27, 2023 Reel 64126, frame 396	Werner Co.	Wilmington Trust, National Association, as Notes Collateral Agent	Security Interest
Jun 27, 2023 Reel 64205, frame 636	Werner Co.	Willa Finco II SARL (Formerly Triton V Luxco 95 SARL)	Security Interest
Jun 16, 2025 Reel 71649, frame 699	Wilmington Trust, National Association, as Notes Collateral Agent	Werner Co.	Termination and Release of Security Interest in Patents Recorded at Reel 063958, Frame 0740
Jun 16, 2025 Reel 71649, frame 774	Wilmington Trust, National Association, as Notes Collateral Agent	Werner Co.	Termination and Release of Security Interest in Patents Recorded at Reel 064126, Frame 0396
Jun 16, 2025 Reel 71649, frame 887	Willa Finco II SARL	Werner Co.	Termination and Release of Security Interest in Patents Recorded at Reel 064205, Frame 0636

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.

Citations

later US patents cite this one

That is below the median of utility patents granted in 2011 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.

Electrician's Ladder and Method