Term ends Dec 31, 2029 · High confidence
20-year base term ends Nov 7, 2027
Held by Stryker Corporation
Filed Nov 7, 2007 as application 11/936,448 · Granted Aug 23, 2011
Base term plus 785 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Nov 7, 2007
Nov 7, 2007
Term ends
Dec 31, 2029
Dec 31, 2029
Granted
Aug 23, 2011
Aug 23, 2011
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
785
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.
8
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 785 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 Nov 7, 2007, when this application, 11/936,448, was filed | Nov 7, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +785 days, USPTO patent term adjustment record | Dec 31, 2029 | 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 31, 2029 | High confidence |
This family
| US 8,002,774 | this patent Dec 2029 | Dec 2029 |
| Application PCT/US2008/082348 | PCT application no patent term | no patent term |
| US 8,343,156 | In force Nov 2027 | Nov 2027 |
| US 8,746,600 | In force Nov 2027 | Nov 2027 |
| US 9,655,631 | In force Jun 2028 | Jun 2028 |
| US 10,016,204 | Lapsed on the fee record Jul 2026 | Jul 2026 |
| US 10,849,633 | In force Jun 2028 | Jun 2028 |
| US 11,896,238 | In force Oct 2028 | Oct 2028 |
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 |
|---|---|---|---|
| Jan 18, 2008 Reel 20388, frame 30 | Burmeister, Richard F., III; Kalinka, Gary T.; Peterson, Michael J. | Stryker Corporation | Assignment of Assignor's Interest |
| Jul 29, 2009 Reel 23021, frame 580 | Sy, Ben J.; Diehl, Eric K. | M3 Design, Inc. | Assignment of Assignor's Interest |
| Jul 30, 2009 Reel 23025, frame 181 | M3 Design, Inc. | Stryker Corporation | Assignment of Assignor's Interest |
| Dec 18, 2024 Reel 69737, frame 184 | Stryker Corporation | Stryker Corporation | Change of Address |
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 2029
Term ends Dec 31, 2029. No further fees fall due before then
Note
The 785 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
43
later US patents cite this one
That is top 25% of utility patents granted in 2011 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.