Also listed on Pfizer Products Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 10, 2027 · High confidence
20-year base term ended Aug 5, 2023
Held by Lonza Bend Inc.
Filed Aug 5, 2003 as application 10/636,834 · Granted Sep 4, 2012
Base term plus 1497 days of patent term adjustment (USPTO delay)
Today
2003
2027
Clock starts
Aug 5, 2003
Aug 5, 2003
Term ends
Sep 10, 2027
Sep 10, 2027
Granted
Sep 4, 2012
Sep 4, 2012
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
1,497
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.
2
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 1497 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 Aug 5, 2003, when this application, 10/636,834, was filed | Aug 5, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1497 days, USPTO patent term adjustment record | Sep 10, 2027 | 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 | Sep 10, 2027 | High confidence |
This family
| US 8,257,739 | this patent Sep 2027 | Sep 2027 |
| US 8,491,933 | Lapsed on the fee record Jul 2017 | Jul 2017 |
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 |
|---|---|---|---|
| Dec 19, 2008 Reel 21998, frame 880 | Pfizer Inc.; Pfizer Products Inc. | Bend Research, Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 Reel 31182, frame 146 | Bend Research, Inc. | Pfizer Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 Reel 31182, frame 154 | Babcock, Walter C.; Caldwell, William B.; Crew, Marshall D.; Friesen, Dwayne T.; Smithey, Daniel T. | Bend Research, Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 Reel 31182, frame 176 | Pfizer Inc. | Pfizer Products Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 Reel 31182, frame 204 | Shanker, Ravi M. | Pfizer Inc.; Pfizer Products Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 reel/frame not recorded | Shanker, Ravi M. | Pfizer Inc. | Assignment of Assignor's Interest |
| Sep 11, 2013 reel/frame not recorded | Shanker, Ravi M. | Pfizer Products Inc. | Assignment of Assignor's Interest |
| Feb 2, 2023 Reel 62971, frame 292 | Bend Research, Inc. | Lonza Bend Inc. | 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.
What's changing
Sep 2027
Term ends Sep 10, 2027. No further fees fall due before then
Note
The 1497 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2012 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.