The Patent Finder
US

Method for Reduction of Soft Error Rates in Integrated Circuits

US 7,601,627 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Oct 13, 2013 on the fee record · High confidence

First maintenance fee unpaid; grace period ended.

Filed Mar 19, 2008 as application 12/051,040 · Granted Oct 13, 2009
Base term, 20 years from filing
Today
Lapsed Oct 13, 2013
2005 2026
Clock starts
Jul 18, 2005
No longer in force
Oct 13, 2013
Granted
Oct 13, 2009
Term would have run to
Jul 18, 2025
base term 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
None
Term adjustment
No prosecution delay on this record.
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 Jul 18, 2025: 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Jul 18, 2005, when application 11/183,647, the earliest non-provisional in its chain, was filed (this one was filed Mar 19, 2008)Jul 18, 2025High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Oct 13, 2013High confidence
Computed term endThe steps above, in orderOct 13, 2013High confidence

This family

US 7,381,635In force
Nov 2026
Nov 2026
Application PCT/US2006/013173PCT application
no patent term
no patent term
US 7,601,627this patent
Oct 2013
Oct 2013
US 7,781,871Lapsed on the fee record
Aug 2014
Aug 2014
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
Sep 3, 2015
Reel 36550, frame 1
International Business Machines CorporationGlobalFoundries U.S. 2 LLCAssignment of Assignor's Interest
Oct 5, 2015
Reel 36779, frame 1
GlobalFoundries U.S. 2 LLC; GlobalFoundries U.S. Inc.GlobalFoundries Inc.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