Also listed on Reedhycalog, L.P., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jun 29, 2030 · High confidence
20-year base term ends Sep 29, 2028
Held by GP USA Holding, LLC
Filed Sep 29, 2008 as application 12/239,915 · Granted Dec 27, 2011
Base term plus 638 days of patent term adjustment (USPTO delay)
Today
2008
2030
Clock starts
Sep 29, 2008
Sep 29, 2008
Term ends
Jun 29, 2030
Jun 29, 2030
Granted
Dec 27, 2011
Dec 27, 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
638
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 638 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 Sep 29, 2008, when this application, 12/239,915, was filed | Sep 29, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +638 days, USPTO patent term adjustment record | Jun 29, 2030 | 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 | Jun 29, 2030 | 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 27, 2008 Reel 21738, frame 710 | Sreshta, Harold A.; Sanchez, Hector Adrian; Drake, Eric F.; Desai, Neerali | Reedhycalog, L.p. | Assignment of Assignor's Interest |
| Aug 23, 2019 Reel 50151, frame 700 | Reedhycalog, L.p. | GP USA Holding, LLC | Assignment of Assignor's 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.
What's changing
Jun 2030
Term ends Jun 29, 2030. No further fees fall due before then
Note
The 638 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median 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.