Term ends May 15, 2040 · High confidence
20-year base term ends May 15, 2040
Held by SunEdison, Inc.
Filed Jan 9, 2023 as application 18/151,989 · Granted Oct 7, 2025
Base term, 20 years from filing
Today
2020
2040
Clock starts
May 15, 2020
May 15, 2020
Term ends
May 15, 2040
May 15, 2040
Granted
Oct 7, 2025
Oct 7, 2025
base term
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
3
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 is its 20-year base term, with no adjustment for prosecution delay. 0 of 3 maintenance fees are paid so far. 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 15, 2020, when application 16/875,468, the earliest non-provisional in its chain, was filed (this one was filed Jan 9, 2023) | May 15, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 15, 2040 | High confidence |
This family
| US 11,585,010 | In force May 2040 | May 2040 |
| US 12,195,872 | In force May 2040 | May 2040 |
| US 12,435,440 | this patent May 2040 | May 2040 |
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 |
|---|---|---|---|
| Jan 11, 2023 Reel 62347, frame 955 | Luter, William L.; Sreedharamurthy, Hariprasad; Haringer, Stephan; Phillips, Richard J.; Wu, Yu-chaio | GlobalWafers Co., Ltd. | Assignment of Assignor's Interest |
| Jan 12, 2023 Reel 62377, frame 742 | Zhang, Nan | Memc Electronic Materials, Inc. | Employee Agreement |
| Jan 12, 2023 Reel 62378, frame 184 | SunEdison Semiconductor Limited; Memc Japan Ltd.; Memc Electronic Materials, S.p.a. | GlobalWafers Co., Ltd. | Assignment of Assignor's Interest |
| Jan 12, 2023 Reel 62378, frame 235 | Memc Electronic Materials, Inc. | SunEdison, Inc. | Change of Name |
| Jan 12, 2023 Reel 62378, frame 811 | SunEdison, Inc. | SunEdison Semiconductor Limited | Separation Agreement |
| Jan 31, 2025 Reel 70075, frame 447 | Luter, William L.; Sreedharamurthy, Hariprasad; Haringer, Stephan; Phillips, Richard J.; Wu, Yu-chiao | GlobalWafers Co., Ltd. | Corrective Assignment to Correct the Conveying Party Data Previously Recorded at Reel: 62347 Frame: 955. Assignor(S) Hereby Confirms the Assignment. |
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
May 2040
Term ends May 15, 2040. Maintenance fees still fall due before then
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.