Asymmetric Memory Migration in Hybrid Main Memory

US 9,672,158 Lapsed on the fee record

Lapsed Jun 6, 2025 on the fee record · Medium confidence

Computed 20-year base term

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 9,262,333), so the cap could be lower.

Second maintenance fee unpaid; grace period ended.

Held by SanDisk Technologies, Inc.

Filed Jan 7, 2016 as application 14/990,314 · Granted Jun 6, 2017

Base term, 20 years from filing, plus 40 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

Lapsed Jun 6, 2025

2007 2027

Clock starts
Nov 5, 2007

No longer in force
Jun 6, 2025

Granted
Jun 6, 2017

Term would have run to
Aug 30, 2027

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

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Capped

Terminal disclaimer

Resolved from the filed document, referencing US 7,774,556, US 8,555,002, US 9,262,333.

1 of 2

Maintenance fees paid

Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.

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.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Nov 5, 2007, when the earliest non-provisional application in its chain was filed (this one was filed Jan 7, 2016)	Nov 5, 2027	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+40 days, USPTO patent term adjustment record	Dec 15, 2027	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 7,774,556, US 8,555,002, US 9,262,333)	capped to Aug 30, 2027	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 2 maintenance fees paid	lapsed Jun 6, 2025	High confidence
Computed term end	The steps above, in order	Jun 6, 2025	Medium confidence

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.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Asymmetric Memory Migration in Hybrid Main Memory

Lapsed Jun 6, 2025 on the fee record · Medium confidence

20-year base term ends Nov 5, 2027

How we calculated this date

Sources