Also listed on Pharmacia & Upjohn Company, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Feb 14, 2028 · High confidence
20-year base term ended Mar 31, 2025
Held by Zoetis Services LLC
Filed Mar 31, 2005 as application 11/095,381 · Granted Jan 26, 2010
Base term plus 1050 days of patent term adjustment (USPTO delay)
Today
2005
2028
Clock starts
Mar 31, 2005
Mar 31, 2005
Term ends
Feb 14, 2028
Feb 14, 2028
Granted
Jan 26, 2010
Jan 26, 2010
base term
patent term adjustment
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
1,050
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.
This patent's term runs 1050 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Mar 31, 2005, when this application, 11/095,381, was filed | Mar 31, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1050 days, USPTO patent term adjustment record | Feb 14, 2028 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Feb 14, 2028 | High confidence |
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 |
|---|---|---|---|
| May 23, 2005 Reel 16048, frame 400 | Sun, Changquan; O'connor, Garry | Pharmacia & Upjohn Company LLC | Assignment of Assignor's Interest |
| Mar 22, 2013 Reel 30066, frame 517 | Pharmacia & Upjohn Company LLC | Pah P&U LLC | Assignment of Assignor's Interest |
| May 13, 2013 Reel 30399, frame 710 | Pah P&U LLC | Zoetis P&U LLC | Change of Name |
| May 13, 2015 Reel 35623, frame 700 | Zoetis P&U LLC | Zoetis Services LLC | Merger |
| Jun 5, 2017 Reel 42683, frame 199 | Zoetis Services LLC | Zoetis Services LLC | Address Change of Assignee |
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.
What's changing
Feb 2028
Term ends Feb 14, 2028. No further fees fall due before then
Note
The 1050 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2010 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.