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Devices and Methods for the Production of Microfibers and Nanofibers in a Controlled Environment

US 9,827,728 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Nov 28, 2025 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Held by Clarcor Inc.
Filed Aug 6, 2013 as application 13/960,383 · Granted Nov 28, 2017
Base term, 20 years from filing, plus 598 days of patent term adjustment (USPTO delay)
Today
Lapsed Nov 28, 2025
2013 2035
Clock starts
Aug 6, 2013
No longer in force
Nov 28, 2025
Granted
Nov 28, 2017
Term would have run to
Mar 27, 2035
base term patent term adjustment 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
598
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.
5
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 Mar 27, 2035: its 20-year base term plus 598 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 Aug 6, 2013, when this application, 13/960,383, was filedAug 6, 2033High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+598 days, USPTO patent term adjustment recordMar 27, 2035High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidlapsed Nov 28, 2025High confidence
Computed term endThe steps above, in orderNov 28, 2025High confidence

This family

US 9,981,439Lapsed on the fee record
May 2026
May 2026
US 9,827,728this patent
Nov 2025
Nov 2025
US 9,731,466In force
Mar 2035
Mar 2035
US 9,527,257In force
Aug 2034
Aug 2034
US 9,889,620In force
Apr 2036
Apr 2036
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 29, 2013
Reel 31502, frame 787
Kay, Stephen; Ner, Yogesh; Castellano, LenardFiberio Technology CorporationAssignment of Assignor's Interest
Mar 31, 2015
Reel 35302, frame 27
Fiberio Technology CorporationComerica BankSecurity Interest
Apr 1, 2016
Reel 38328, frame 720
Comerica BankFiberio Technology CorporationRelease of Security Interest Recorded at Reel 035302, Frame 0027
May 4, 2016
Reel 38458, frame 869
Fiberio Technology CorporationClarcor 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 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