Lapsed Mar 6, 2026 on the fee record · High confidence

Computed 20-year base term

Second maintenance fee unpaid; grace period ended.

Held by The Trustees of Princeton University

Filed Oct 17, 2016 as application 15/295,492 · Granted Mar 6, 2018

Base term, 20 years from filing

Today

Lapsed Mar 6, 2026

2009 2029

Clock starts
Jan 9, 2009

No longer in force
Mar 6, 2026

Granted
Mar 6, 2018

Term would have run to
Jan 9, 2029

base term after the term ends fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.

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.

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 Jan 9, 2029: 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.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Jan 9, 2009, when application PCT/US2009/030570, the earliest non-provisional in its chain, was filed (this one was filed Oct 17, 2016)	Jan 9, 2029	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	High confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 2 maintenance fees paid	lapsed Mar 6, 2026	High confidence
Computed term end	The steps above, in order	Mar 6, 2026	High confidence

This family

US 8,278,757	In force (reinstated) Jun 2029	Jun 2029
US 8,697,485	Lapsed on the fee record Apr 2026	Apr 2026
US 9,107,312	In force Jan 2029	Jan 2029
US 9,504,150	Lapsed on the fee record Nov 2024	Nov 2024
US 9,913,374	this patent Mar 2026	Mar 2026
US 10,244,628	In force Jan 2029	Jan 2029

6 of 7 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.

Recorded	Assignor	Assignee	Conveyance
Feb 21, 2019 Reel 50092, frame 733	Princeton University	United States of America as Represented by the Administrator of Nasa	License
Jul 19, 2019 Reel 49809, frame 17	Princeton University	United States of America as Represented by the Administrator of Nasa	License

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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Alerts on its grants, lapses and transfers.

Citations

later US patent cites this one

That is below the median of utility patents granted in 2018 in our data, the only group it is compared against. How we rank

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.

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