Also listed on Chestnut Medical Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 28, 2027 · High confidence
20-year base term ended May 25, 2025
Held by Covidien LP
Filed May 24, 2006 as application 11/420,023 · Granted Sep 18, 2012
Base term plus 613 days of patent term adjustment (USPTO delay)
Today
2005
2027
Clock starts
May 25, 2005
May 25, 2005
Term ends
Jan 28, 2027
Jan 28, 2027
Granted
Sep 18, 2012
Sep 18, 2012
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
613
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.
50
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 613 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 May 25, 2005, when application 11/136,398, the earliest non-provisional in its chain, was filed (this one was filed May 24, 2006) | May 25, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +613 days, USPTO patent term adjustment record | Jan 28, 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 | Jan 28, 2027 | High confidence |
This family
| US 8,398,701 | Lapsed on the fee record Mar 2021 | Mar 2021 |
| US 8,147,534 | Lapsed on the fee record Apr 2020 | Apr 2020 |
| US 8,267,985 | this patent Jan 2027 | Jan 2027 |
| US 8,617,234 | Term ended Jun 2025 | Jun 2025 |
| Application 11/420,025 | Abandoned not computed | not computed |
| Application PCT/US2007/011551 | PCT application no patent term | no patent term |
| Application PCT/US2007/011666 | PCT application no patent term | no patent term |
| US 8,257,421 | Lapsed on the fee record Sep 2024 | Sep 2024 |
8 of 50 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| May 26, 2006 Reel 17684, frame 99 | Garcia, Adrian; Ye, Ting Tina; Tran, Quang Q; Berez, Aaron L | Chestnut Medical Technologies, Inc. | Assignment of Assignor's Interest |
| Nov 23, 2011 Reel 27274, frame 554 | EV3 LLC | Tyco Healthcare Group LP | Assignment of Assignor's Interest |
| Nov 23, 2011 Reel 27276, frame 542 | Chestnut Medical Technologies, Inc. | EV3 Inc. | Merger |
| Nov 23, 2011 Reel 27281, frame 704 | EV3 Inc. | EV3 LLC | Merger |
| May 17, 2013 Reel 30427, frame 385 | Tyco Healthcare Group LP | Covidien LP | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jan 2027
Term ends Jan 28, 2027. No further fees fall due before then
Note
The 613 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
231
later US patents cite this one
That is top 5% 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.