Also listed on Cardiothoracic Systems, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 12, 2031 · High confidence
20-year base term ends Mar 21, 2028
Held by Maquet Cardiovascular LLC
Filed Mar 21, 2008 as application 12/053,065 · Granted Apr 9, 2013
Base term plus 1361 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Mar 21, 2008
Mar 21, 2008
Term ends
Dec 12, 2031
Dec 12, 2031
Granted
Apr 9, 2013
Apr 9, 2013
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
1,361
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 1361 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 Mar 21, 2008, when this application, 12/053,065, was filed | Mar 21, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1361 days, USPTO patent term adjustment record | Dec 12, 2031 | 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, 2031 | 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 |
|---|---|---|---|
| Mar 9, 2009 Reel 22365, frame 43 | Cardiothoracic Systems LLC | Maquet Cardiovascular LLC | Assignment of Assignor's Interest |
| Jun 18, 2009 Reel 22845, frame 476 | Cardiothoracic Systems, Inc. | Cardiothoracic Systems LLC | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Dec 2031
Term ends Dec 12, 2031. No further fees fall due before then
Note
The 1361 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
35
later US patents cite this one
That is top 25% 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.