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Force-Sensing Electronic Pen with User-Replaceable Cartridge

US 8,308,387 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Nov 13, 2016 on the fee record · High confidence

First maintenance fee unpaid; grace period ended.

Filed Jul 5, 2009 as application 12/497,684 · Granted Nov 13, 2012
Base term, 20 years from filing, plus 410 days of patent term adjustment (USPTO delay)
Today
Lapsed Nov 13, 2016
2005 2026
Clock starts
Aug 1, 2005
No longer in force
Nov 13, 2016
Granted
Nov 13, 2012
Term would have run to
Sep 15, 2026
base term patent term adjustment after the term ends 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
410
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
4
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 Sep 15, 2026: its 20-year base term plus 410 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 Aug 1, 2005, when application 11/193,435, the earliest non-provisional in its chain, was filed (this one was filed Jul 5, 2009)Aug 1, 2025High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+410 days, USPTO patent term adjustment recordSep 15, 2026High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Nov 13, 2016High confidence
Computed term endThe steps above, in orderNov 13, 2016High confidence

This family

US 7,567,241Lapsed on the fee record
Jul 2013
Jul 2013
US 7,794,167In force
Jul 2028
Jul 2028
US 8,308,387this patent
Nov 2016
Nov 2016
US 7,955,017Lapsed on the fee record
Jun 2015
Jun 2015
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 5, 2009
Reel 22912, frame 449
King, Tobin Allen; Silverbrook, KiaSilverbrook Research Pty Ltd.Assignment 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