Materials with Covalently-Bonded, Nonleachable, Polymeric Antimicrobial Surfaces

US 7,709,694 Lapsed on the fee record

Lapsed May 4, 2022 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 7,045,673), so the cap could be lower.

Third maintenance fee unpaid; grace period ended.

Held by University of Florida Research Foundation, Inc.

Filed Sep 28, 2001 as application 09/965,740 · Granted May 4, 2010

Base term plus 1637 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

20 years from filing

Lapsed May 4, 2022

2001 2026

Clock starts
Sep 28, 2001

Term ended
May 4, 2022

Granted
May 4, 2010

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

1,637

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 7,045,673.

2 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 Sep 28, 2001, when this application, 09/965,740, was filed	Sep 28, 2021	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+1637 days, USPTO patent term adjustment record	Mar 23, 2026	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 7,045,673)	capped to Dec 8, 2019	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 2 maintenance fees paid	lapsed May 4, 2022	High confidence
Computed term end	The steps above, in order	May 4, 2022	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.

Materials with Covalently-Bonded, Nonleachable, Polymeric Antimicrobial Surfaces

Lapsed May 4, 2022 on the fee record · Medium confidence

20-year base term ended Sep 28, 2021

How we calculated this date

Sources