Also listed on Surmodics SMP, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 18, 2029 · High confidence
20-year base term ends Sep 18, 2029
Held by Evonik Operations GmbH
Filed Sep 18, 2009 as application 12/562,455 · Granted Nov 3, 2020
Base term, 20 years from filing
Today
2009
2029
Clock starts
Sep 18, 2009
Sep 18, 2009
Term ends
Sep 18, 2029
Sep 18, 2029
Granted
Nov 3, 2020
Nov 3, 2020
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.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. 1 of 2 maintenance fees is 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 Sep 18, 2009, when this application, 12/562,455, was filed | Sep 18, 2029 | 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 | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 18, 2029 | 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 |
|---|---|---|---|
| Nov 12, 2009 Reel 23504, frame 953 | Raiche, Adrian; Campbell, Jason; Nettles, Heather; Womack, Allison | Surmodics Pharmaceuticals, Inc. | Assignment of Assignor's Interest |
| May 29, 2013 Reel 30507, frame 684 | Surmodics Pharmaceuticals, Inc. | Surmodics SMP, Inc. | Change of Name |
| May 30, 2013 Reel 30517, frame 325 | Surmodics SMP, Inc. | Evonik Corporation | Assignment of Assignor's Interest |
| May 2, 2025 Reel 71152, frame 488 | Evonik Corporation | Evonik Operations GmbH | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2029
Term ends Sep 18, 2029. Maintenance fees still fall due before then
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2020 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.