Compound for Treating Oxidative Stress in Mammals

US 11,406,681 Lapsed on the fee record

Lapsed Aug 9, 2026 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 11,596,663), so the cap could be lower.

First maintenance fee unpaid; grace period ended.

Held by Hemopet

Filed Oct 14, 2021 as application 17/501,309 · Granted Aug 9, 2022

Base term, 20 years from filing

Today

Lapsed Aug 9, 2026

2020 2040

Clock starts
Dec 7, 2020

No longer in force
Aug 9, 2026

Granted
Aug 9, 2022

Term would have run to
Dec 7, 2040

base term after the term ends 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

None

Term adjustment

No prosecution delay on this record.

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 11,596,663, to Dec 7, 2040. The term already ends on or before that date, so the cap shortened nothing.

0 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.

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 Dec 7, 2020, when the earliest non-provisional application in its chain was filed (this one was filed Oct 14, 2021)	Dec 7, 2040	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	Disclaimer resolved from the filed document (refs US 11,596,663)	resolves to Dec 7, 2040, no earlier than this term, so no change	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	0 of 3 maintenance fees paid	lapsed Aug 9, 2026	High confidence
Computed term end	The steps above, in order	Aug 9, 2026	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.

Compound for Treating Oxidative Stress in Mammals

Lapsed Aug 9, 2026 on the fee record · Medium confidence

20-year base term ends Dec 7, 2040

How we calculated this date

Sources