Collateral for a security interest recorded Feb 28, 2024 (Wilmington Trust, National Association).
Term ends Dec 12, 2026 · High confidence
20-year base term ended Apr 18, 2025
Held by Cook Medical Technologies LLC
Filed Apr 18, 2005 as application 11/108,255 · Granted Dec 1, 2009
Base term plus 603 days of patent term adjustment (USPTO delay)
Today
2005
2026
Clock starts
Apr 18, 2005
Apr 18, 2005
Term ends
Dec 12, 2026
Dec 12, 2026
Granted
Dec 1, 2009
Dec 1, 2009
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
603
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 603 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 Apr 18, 2005, when this application, 11/108,255, was filed | Apr 18, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +603 days, USPTO patent term adjustment record | Dec 12, 2026 | 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 | Dec 12, 2026 | 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 |
|---|---|---|---|
| Oct 17, 2005 Reel 16890, frame 488 | Osborne, Thomas A.; Molgaard-nielsen, Arne; Hendriksen, Per; Gunther, Rolf | Cook Incorporated | Assignment of Assignor's Interest |
| Apr 19, 2006 Reel 17509, frame 514 | Osborne, Thomas A.; Molgaard-nielsen, Arne; Hendriksen, Per; Gunther, Rolf | Cook Incorporated; William Cook Europe APS | Corrective Assignment to Correct Execution Dates of All Conveying Parties and Receiving Party, Previously Recorded at Reel 016890, Frame 0488. |
| Apr 19, 2006 reel/frame not recorded | Gunther, Rolf; Hendriksen, Per; Molgaard-nielsen, Arne; Osborne, Thomas A. | Cook Incorporated | Corrective Assignment to Correct Execution Dates of All Conveying Parties and Receiving Party, Previously Recorded at Reel 016890, Frame 0488. |
| Apr 19, 2006 reel/frame not recorded | Gunther, Rolf; Hendriksen, Per; Molgaard-nielsen, Arne; Osborne, Thomas A. | William Cook Europe APS | Corrective Assignment to Correct Execution Dates of All Conveying Parties and Receiving Party, Previously Recorded at Reel 016890, Frame 0488. |
| Mar 13, 2008 Reel 20649, frame 91 | Hemmingsen, Allan G. | Cook Incorporated; William Cook Europe APS | Assignment of Assignor's Interest |
| Mar 13, 2008 reel/frame not recorded | Hemmingsen, Allan G. | Cook Incorporated | Assignment of Assignor's Interest |
| Mar 13, 2008 reel/frame not recorded | Hemmingsen, Allan G. | William Cook Europe APS | Assignment of Assignor's Interest |
| May 16, 2011 Reel 26277, frame 445 | William Cook Europe APS | Cook Medical Technologies LLC | Assignment of Assignor's Interest |
| May 17, 2011 Reel 26287, frame 923 | Cook Incorporated; Wilson-Cook Medical Incorporated; Vance Products Incorporated; Cook Vascular Incorporated; Sabin Corporation | Cook Medical Technologies LLC | Assignment of Assignor's Interest |
| Feb 28, 2024 Reel 66700, frame 277 | Cook Medical Technologies LLC | Wilmington Trust, National Association, as Collateral Agent | Security 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
Dec 2026
Term ends Dec 12, 2026. No further fees fall due before then
Note
The 603 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
138
later US patents cite this one
That is top 5% of utility patents granted in 2009 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.