The Patent Finder
US

Pipe tradesman's ladder and method

US 10,208,538 In force
OverviewFamilyAssignmentsSources & methods
Collateral for a security interest recorded Jun 16, 2025 (Ares Capital Corporation).

Term ends Jan 12, 2029 · High confidence

Held by Werner Co.
Filed May 3, 2006 as application 11/416,967 · Granted Feb 19, 2019
Base term plus 1056 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2006 2029
Clock starts
Feb 21, 2006
Term ends
Jan 12, 2029
Granted
Feb 19, 2019
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
1,056
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 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
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 1056 days past its 20-year base term on prosecution delay. 2 of 2 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Feb 21, 2006, when application 11/358,626, the earliest non-provisional in its chain, was filed (this one was filed May 3, 2006)Feb 21, 2026High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+1056 days, USPTO patent term adjustment recordJan 12, 2029High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 2 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderJan 12, 2029High confidence

This family

US 7,886,872In force
Jan 2029
Jan 2029
US 10,208,538this patent
Jan 2029
Jan 2029
US 8,016,078Lapsed on the fee record
Sep 2023
Sep 2023
US 8,944,213Term ended
Feb 2026
Feb 2026
US 10,697,239Term ended
Feb 2026
Feb 2026
Application 16/272,739Abandoned
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.
RecordedAssignorAssigneeConveyance
Jul 26, 2006
Reel 18018, frame 424
Astor, Kyle G.; Latimer, BrettWerner Co.Assignment of Assignor's Interest
Jul 26, 2006
Reel 18018, frame 436
Grebinoski, James J.Werner Co.Assignment of Assignor's Interest
Apr 29, 2011
Reel 26200, frame 981
Werner Co.Bank of America, N.A., as Administrative AgentSecurity Agreement
Jul 24, 2017
Reel 43318, frame 824
Bank of America, N.A., as Administrative AgentWerner 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 AgentRelease 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 AgreementPatent 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 AgreementPatent Security Agreement (TERM Loan)
Jun 12, 2023
Reel 63958, frame 740
Werner Co.Wilmington Trust, National Association, as Notes Collateral AgentSecurity Interest
Jun 12, 2023
Reel 63957, frame 231
JPMorgan Chase Bank, N.A., as Collateral AgentKnaack 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 AgentKnaack LLCRelease of Security Interest in Patents at R/F 043328/0001
Jun 12, 2023
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Collateral AgentWerner 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 AgentWerner 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 AgentSecurity 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 71636, frame 185
Werner Co.Ares Capital Corporation, As Collateral AgentSecurity Interest
Jun 16, 2025
Reel 71649, frame 699
Wilmington Trust, National Association, as Notes Collateral AgentWerner 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 AgentWerner 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 SARLWerner 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.

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