Also listed on Epoch Company, Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 20, 2031 · High confidence
20-year base term ends Sep 16, 2030
Held by Entegris, Inc.
Filed Sep 16, 2010 as application 12/807,898 · Granted Nov 18, 2014
Base term plus 126 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Sep 16, 2010
Sep 16, 2010
Term ends
Jan 20, 2031
Jan 20, 2031
Granted
Nov 18, 2014
Nov 18, 2014
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
126
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 126 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 16, 2010, when this application, 12/807,898, was filed | Sep 16, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +126 days, USPTO patent term adjustment record | Jan 20, 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 | Jan 20, 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 |
|---|---|---|---|
| Feb 7, 2012 Reel 27663, frame 4 | Lee, Kang-hua; Liu, Wen-cheng | Epoch Material Co., Ltd. | Assignment of Assignor's Interest |
| May 10, 2022 Reel 60749, frame 266 | Epoch Material Co., Ltd. | CMC Materials Taiwan Co., Ltd. | Change of Name |
| Jun 22, 2022 Reel 60392, frame 312 | Epoch Material Co., Ltd. | CMC Materials Taiwan Co., Ltd. | Change of Name |
| Oct 12, 2023 Reel 65203, frame 964 | CMC Materials Taiwan Co., Ltd. | Entegris, 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
Jan 2031
Term ends Jan 20, 2031. No further fees fall due before then
Note
The 126 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2014 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.