Term ends Feb 13, 2035 · High confidence
20-year base term ends Feb 13, 2035
Held by Respivert Limited
Filed Aug 31, 2016 as application 15/253,141 · Granted Apr 18, 2017
Base term, 20 years from filing
Today
2015
2035
Clock starts
Feb 13, 2015
Feb 13, 2015
Term ends
Feb 13, 2035
Feb 13, 2035
Granted
Apr 18, 2017
Apr 18, 2017
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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 grant. This counts the ones the record shows paid.
5
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 is its 20-year base term, with no adjustment for prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: High. 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 13, 2015, when application 14/622,368, the earliest non-provisional in its chain, was filed (this one was filed Aug 31, 2016) | Feb 13, 2035 | 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 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Feb 13, 2035 | High confidence |
This family
| US 9,447,076 | In force Feb 2035 | Feb 2035 |
| US 9,624,196 | this patent Feb 2035 | Feb 2035 |
| US 10,045,980 | In force no later than Feb 2035 | no later than Feb 2035 |
| US 10,815,217 | In force Feb 2035 | Feb 2035 |
| US 11,634,406 | In force Feb 2035 | Feb 2035 |
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 |
|---|---|---|---|
| Apr 20, 2017 Reel 42083, frame 755 | Topivert Pharma Limited | Respivert Limited | Assignment of Assignor's Interest |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Feb 2035
Term ends Feb 13, 2035. Maintenance fees still fall due before then
Citations
25
later US patents cite this one
That is top 25% of utility patents granted in 2017 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.