Apparatus, systems and method for collecting and reclaiming anaesthetic agents and for removing nitrous oxide from exhaust gases

US 12,403,280 In force

Overview Sources & methods

Term ends Apr 17, 2033 · From the USPTO record

Computed 20-year base term

Named at grant Class 1 Inc. · find this owner

Filed Mar 24, 2021 as application 17/210,943 · Granted Sep 2, 2025

Base term plus 790 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Apr 17, 2033

2011 2033

Clock starts
Feb 17, 2011

Term ends
Apr 17, 2033

Granted
Sep 2, 2025

base term patent term adjustment 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

790

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

0 of 1

Maintenance fees paid

One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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 Feb 17, 2011, when the earliest non-provisional application in its chain was filed (this one was filed Mar 24, 2021); a parent in its chain could not be resolved (the next row)	Feb 17, 2031	High confidence
Continuity chain	A parent in the chain could not be resolved	dated from this application's own claim	Medium confidence
Patent term adjustment	+790 days, USPTO patent term adjustment record	Apr 17, 2033	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	0 of 1 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Apr 17, 2033	From the USPTO record

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.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

Apparatus, systems and method for collecting and reclaiming anaesthetic agents and for removing nitrous oxide from exhaust gases

Term ends Apr 17, 2033 · From the USPTO record

20-year base term ends Feb 17, 2031

How we calculated this date

Sources