Term ended May 17, 2020 · Medium confidence
20-year base term ended Feb 7, 2020
Why Medium: A parent in the chain could not be resolved.
Held by ResMed Pty Ltd.
Filed Nov 2, 2001 as application 09/985,458 · Granted Aug 15, 2006
Base term plus 100 days of patent term adjustment (USPTO delay)
Today
Term ended May 17, 2020
2000
2026
Clock starts
Feb 7, 2000
Feb 7, 2000
Term ended
May 17, 2020
May 17, 2020
Granted
Aug 15, 2006
Aug 15, 2006
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
100
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
This patent's term runs 100 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 Feb 7, 2000, when application 09/498,705, the earliest non-provisional in its chain, was filed (this one was filed Nov 2, 2001); a parent in its chain could not be resolved (the next row) | Feb 7, 2020 | 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 | +100 days, USPTO patent term adjustment record | May 17, 2020 | 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 | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | May 17, 2020 | Medium confidence |
This family
| US 7,185,652 | Term ended Feb 2020 | Feb 2020 |
| US 7,089,939 | this patent 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 | Lapsed on the fee record 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 |
|---|---|---|---|
| Nov 2, 2001 Reel 12299, frame 160 | Gunaratnam, Michael K.; Kwok, Philip R.; Lithgow, Perry D. | ResMed Limited | Assignment of Assignor's Interest |
| Jul 7, 2004 Reel 15537, frame 709 | Smart, Gregory Scott | ResMed Limited | Assignment of Assignor's Interest |
| Jul 7, 2004 Reel 15537, frame 724 | Smart, Gregory Scott | ResMed (R&D) Limited | Assignment of Assignor's Interest |
| Jul 7, 2004 Reel 15537, frame 729 | Walker, Adrienne Mary Claire | ResMed Limited | Assignment of Assignor's Interest |
| Jul 7, 2004 Reel 15537, frame 732 | Crumblin, Geoffrey | ResMed Limited | Assignment of Assignor's Interest |
| Jul 7, 2004 Reel 15538, frame 227 | ResMed (R&D) Limited | ResMed Limited | Assignment of Assignor's Interest |
| 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
The 100 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
178
later US patents cite this one
That is top 5% of utility patents granted in 2006 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.