The Patent Finder
US

Three-Dimensional Porous Polyurea Networks and Methods of Manufacture

US 11,192,994 In force
OverviewFamilyAssignmentsSources & methods

Term ends Aug 19, 2031 · High confidence

Filed Apr 4, 2019 as application 16/374,958 · Granted Dec 7, 2021
Base term, 20 years from filing
Today
20 years from filing
2011 2031
Clock starts
Aug 19, 2011
Term ends
Aug 19, 2031
Granted
Dec 7, 2021
base term 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.
6
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term is its 20-year base term, with no adjustment for prosecution delay. 1 of 2 maintenance fees is paid so far. 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 Aug 19, 2011, when application 13/214,061, the earliest non-provisional in its chain, was filed (this one was filed Apr 4, 2019)Aug 19, 2031High 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 events1 of 2 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderAug 19, 2031High confidence

This family

US 10,301,445In force
Aug 2031
Aug 2031
Application 13/969,350Abandoned
not computed
not computed
US 9,068,346In force
Aug 2031
Aug 2031
US 11,192,994this patent
Aug 2031
Aug 2031
Application 17/515,983Abandoned
not computed
not computed
Application 18/319,538Abandoned
not computed
not computed
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 13, 2020
Reel 51808, frame 46
Sotiriou-leventis, Chariklia; Mulik, SudhirLeventis, NicholasAssignment of Assignor's Interest
Feb 13, 2020
Reel 51808, frame 63
Leventis, NicholasAerogel Technologies, LLCAssignment 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 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited