Lapsed Oct 13, 2021 on the fee record · Low confidence
20-year base term ended Dec 16, 2019
Third maintenance fee unpaid; grace period ended.
Held by ResMed Pty Ltd.
Filed Mar 6, 2002 as application 10/090,173 · Granted Oct 13, 2009
Base term, 20 years from filing, plus 1543 days of patent term adjustment (USPTO delay)
Today
Lapsed Oct 13, 2021
1999
2026
Clock starts
Dec 16, 1999
Dec 16, 1999
No longer in force
Oct 13, 2021
Oct 13, 2021
Granted
Oct 13, 2009
Oct 13, 2009
Term would have run to
Mar 7, 2024
Mar 7, 2024
base term
patent term adjustment
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
1,543
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
2 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.
323
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 7, 2024: its 20-year base term plus 1543 days of term adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Low. 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.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 16, 1999, when application 29/115,618, the earliest non-provisional in its chain, was filed (this one was filed Mar 6, 2002); a parent in its chain could not be resolved (the next row) | Dec 16, 2019 | 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 | +1543 days, USPTO patent term adjustment record | Mar 7, 2024 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Oct 13, 2021 | High confidence |
| Computed term end | The steps above, in order | Oct 13, 2021 | Low confidence |
This family
| US 7,185,652 | Term ended Feb 2020 | Feb 2020 |
| US 7,089,939 | Term ended May 2020 | May 2020 |
| US 6,871,649 | Term ended no later than May 2020 | no later than May 2020 |
| US 6,910,483 | Term ended Dec 2022 | Dec 2022 |
| US 7,600,513 | this patent Oct 2021 | Oct 2021 |
| US 6,796,308 | Term ended no later than Mar 2019 | no later than Mar 2019 |
| US 6,557,556 | Term ended no later than Jan 2018 | no later than Jan 2018 |
| US 7,669,599 | Term ended no later than Apr 2020 | no later than Apr 2020 |
8 of 323 applications in this family shown, earliest filings first. 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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Mar 6, 2002 Reel 12669, frame 646 | Gunaratnam, Michael K.; Kwok, Philip R. | ResMed Limited | Assignment of Assignor's Interest |
| Jan 5, 2007 Reel 18770, frame 955 | ResMed Limited | ResMed Limited | Change of Assignee's Address |
| Apr 30, 2019 Reel 50005, frame 461 | ResMed Limited | ResMed Pty Ltd. | Change of Name |
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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 1543 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 13, 2021. We will not guess the cap.
Citations
99
later US patents cite this one
That is top 10% of utility patents granted in 2009 in our data, the only group it is compared against.
How we rank
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.