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Methods for Evaluating Operation of Marking Apparatus

US 8,401,791 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Mar 19, 2021 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Filed Feb 2, 2009 as application 12/364,339 · Granted Mar 19, 2013
Base term, 20 years from filing, plus 876 days of patent term adjustment (USPTO delay)
Today
Lapsed Mar 19, 2021
2007 2029
Clock starts
Mar 13, 2007
No longer in force
Mar 19, 2021
Granted
Mar 19, 2013
Term would have run to
Aug 5, 2029
base term patent term adjustment 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
876
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
16
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 Aug 5, 2029: its 20-year base term plus 876 days of term 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Mar 13, 2007, when application 11/685,602, the earliest non-provisional in its chain, was filed (this one was filed Feb 2, 2009)Mar 13, 2027High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+876 days, USPTO patent term adjustment recordAug 5, 2029High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidlapsed Mar 19, 2021High confidence
Computed term endThe steps above, in orderMar 19, 2021High confidence

This family

US 7,640,105In force
no later than Feb 2028
no later than Feb 2028
US 8,060,304In force
Nov 2029
Nov 2029
Application PCT/US2008/055798PCT application
no patent term
no patent term
US 8,386,178In force
Jul 2029
Jul 2029
US 8,700,325Lapsed on the fee record
Apr 2026
Apr 2026
US 9,086,277In force
May 2029
May 2029
US 8,401,791this patent
Mar 2021
Mar 2021
US 8,478,523In force
no later than Dec 2028
no later than Dec 2028
8 of 16 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.
RecordedAssignorAssigneeConveyance
Apr 29, 2009
Reel 22611, frame 846
Nielsen, Steven E.; Chambers, Curtis; Farr, Jeffrey; Conner, Mark A.; Vazquez, Rene A.Certusview Technologies, LLCAssignment 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.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited