Breathable Gas Apparatus with Humidifier

US RE46,543 Lapsed on the fee record

Lapsed Oct 25, 2023 on the fee record · Low confidence

Computed 20-year base term

Third maintenance fee unpaid; grace period ended.

Reissue of US 8,042,535, which was surrendered when this reissue was granted; its term and maintenance fees continue here.

Held by ResMed Pty Ltd.

Filed Mar 24, 2016 as application 15/079,098 · Granted Sep 12, 2017

Base term, 20 years from filing

Today

Lapsed Oct 25, 2023

2004 2026

Clock starts
Jun 21, 2004

No longer in force
Oct 25, 2023

Granted
Sep 12, 2017

Term would have run to
Jun 21, 2024

base term after the term ends fee events 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.

None

Terminal disclaimer

No disclaimer on this record.

2 of 3

Maintenance fees paid

Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from the original patent's grant (Oct 25, 2011). 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 Jun 21, 2004, when the earliest non-provisional application in its chain was filed (this one was filed Mar 24, 2016)	Jun 21, 2024	High confidence
Continuity chain	A reissue: its term follows the original patent's, with the original's term adjustment	follows the original patent	Medium confidence
Patent term adjustment	No term adjustment record on a grant after 2005, so none is added	no change	Medium confidence
Terminal disclaimer cap	None on record	no cap applied	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 3 maintenance fees paid	lapsed Oct 25, 2023	High confidence
Computed term end	The steps above, in order	Oct 25, 2023	Low 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.

Breathable Gas Apparatus with Humidifier

Lapsed Oct 25, 2023 on the fee record · Low confidence

20-year base term ended Jun 21, 2024

How we calculated this date

Sources