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Reduction of Read Disturb Errors in NAND Flash Memory

US 8,189,379 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed May 29, 2020 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Filed Oct 12, 2009 as application 12/577,673 · Granted May 29, 2012
Base term, 20 years from filing, plus 201 days of patent term adjustment (USPTO delay)
Today
Lapsed May 29, 2020
2009 2030
Clock starts
Sep 24, 2009
No longer in force
May 29, 2020
Granted
May 29, 2012
Term would have run to
Apr 13, 2030
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
201
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.
33
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 Apr 13, 2030: its 20-year base term plus 201 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 Sep 24, 2009, when application 12/566,421, the earliest non-provisional in its chain, was filed (this one was filed Oct 12, 2009)Sep 24, 2029High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+201 days, USPTO patent term adjustment recordApr 13, 2030High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidlapsed May 29, 2020High confidence
Computed term endThe steps above, in orderMay 29, 2020High confidence

This family

US 8,176,284Lapsed on the fee record
May 2024
May 2024
US 7,856,528In force
Sep 2029
Sep 2029
US 8,176,360In force
no later than Sep 2029
no later than Sep 2029
US 7,818,525Lapsed on the fee record
Oct 2018
Oct 2018
US 8,189,379this patent
May 2020
May 2020
US 8,775,772Lapsed on the fee record
Jul 2018
Jul 2018
US 7,941,696Lapsed on the fee record
May 2023
May 2023
US 8,190,842Lapsed on the fee record
May 2020
May 2020
8 of 33 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
Feb 3, 2010
Reel 23890, frame 380
Camp, Charles J.; Frost, Holloway H.Texas Memory Systems, Inc.Assignment of Assignor's Interest
Mar 26, 2013
Reel 30081, frame 35
Texas Memory Systems, Inc.International Business Machines CorporationAssignment 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.

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