Term ended Jun 14, 2025 · High confidence
20-year base term ended May 25, 2025
USPTO later recorded it as expired for non-payment on Feb 2, 2026.
Held by Covidien LP
Filed May 24, 2006 as application 11/420,027 · Granted Dec 31, 2013
Base term plus 95 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Term ended Jun 14, 2025
2005
2026
Clock starts
May 25, 2005
May 25, 2005
Term ended
Jun 14, 2025
Jun 14, 2025
Granted
Dec 31, 2013
Dec 31, 2013
base term
patent term adjustment
after the term ends
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
95
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,628,564.
2 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.
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 95 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 11/136,395, 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 | +95 days, USPTO patent term adjustment record | Aug 28, 2025 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,628,564) | capped to Jun 14, 2025 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Feb 2, 2026, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Jun 14, 2025 | 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 | In force Jan 2027 | Jan 2027 |
| US 8,617,234 | this patent 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 202 | Garcia, Adrian; Ye, Ting Tina; Tran, Quang Q; Berez, Aaron L | Chestnut Medical Technologies, Inc. | Assignment of Assignor's Interest |
| Sep 13, 2012 Reel 28958, frame 760 | Chestnut Medical Technologies, Inc. | EV3 Inc. | Merger |
| Sep 13, 2012 Reel 28958, frame 790 | EV3 LLC | Tyco Healthcare Group LP | Assignment of Assignor's Interest |
| Sep 13, 2012 Reel 28959, frame 358 | EV3 Inc. | EV3 LLC | Merger |
| Nov 9, 2012 Reel 29276, frame 94 | 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
Note
The 95 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,628,564.
Citations
194
later US patents cite this one
That is top 5% of utility patents granted in 2013 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.