Also listed on Cool Options, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 16, 2031 · High confidence
20-year base term ended May 26, 2025
Held by Ticona Polymers, Inc.
Filed May 26, 2005 as application 11/138,118 · Granted Jul 17, 2012
Base term plus 2181 days of patent term adjustment (USPTO delay)
Today
2005
2031
Clock starts
May 26, 2005
May 26, 2005
Term ends
May 16, 2031
May 16, 2031
Granted
Jul 17, 2012
Jul 17, 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
2,181
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.
2
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 2181 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 26, 2005, when this application, 11/138,118, was filed | May 26, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2181 days, USPTO patent term adjustment record | May 16, 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 | May 16, 2031 | High confidence |
This family
| US 8,221,885 | this patent May 2031 | May 2031 |
| US 8,853,313 | Term ended Jul 2025 | Jul 2025 |
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, 2005 Reel 16604, frame 387 | Miller, James D. | Cool Options, Inc. | Assignment of Assignor's Interest |
| Oct 22, 2014 Reel 34033, frame 88 | Cool Options, Inc. | Ticona Polymers, Inc. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2031
Term ends May 16, 2031. No further fees fall due before then
Note
The 2181 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
15
later US patents cite this one
That is above the median 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.