The Patent Finder
US

Single Command, Multiple Column-Operation Memory Device

US 9,898,400 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Feb 20, 2026 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Held by Rambus Inc.
Filed Apr 25, 2017 as application 15/497,126 · Granted Feb 20, 2018
Base term, 20 years from filing · capped by a resolved terminal disclaimer
Today
20 years from filing
Lapsed Feb 20, 2026
2010 2030
Clock starts
Jun 17, 2010
Term ended
Feb 20, 2026
Granted
Feb 20, 2018
base term 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
None
Term adjustment
No prosecution delay on this record.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 9,658,953.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
10
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 Jun 29, 2025: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Jun 17, 2010, when application PCT/US2010/039095, the earliest non-provisional in its chain, was filed (this one was filed Apr 25, 2017)Jun 17, 2030High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 9,658,953)capped to Jun 29, 2025High confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 1 maintenance fees paidlapsed Feb 20, 2026High confidence
Computed term endThe steps above, in orderFeb 20, 2026High confidence

This family

Application PCT/US2010/039095PCT application
no patent term
no patent term
Application 13/383,205Abandoned
not computed
not computed
US 9,658,953Term ended
Jun 2025
Jun 2025
US 9,898,400this patent
Feb 2026
Feb 2026
US 10,552,310In force
Jun 2030
Jun 2030
US 11,204,863In force
Jun 2030
Jun 2030
US 11,748,252In force
Jun 2030
Jun 2030
US 11,720,485In force
Jun 2030
Jun 2030
8 of 10 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
Oct 13, 2017
Reel 43863, frame 518
Sheffler, Thomas; Lai, Lawrence; Peng, Liang; Rychlik, BohuslavRambus 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