Term ended May 25, 2026 · High confidence
20-year base term ended May 25, 2026
Held by Wistron Corporation
Filed Jul 1, 2013 as application 13/932,672 · Granted Apr 28, 2015
Base term, 20 years from filing
Today
Term ended May 25, 2026
2006
2026
Clock starts
May 25, 2006
May 25, 2006
Term ended
May 25, 2026
May 25, 2026
Granted
Apr 28, 2015
Apr 28, 2015
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,482,437, to May 25, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.
4
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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. All three maintenance fees were paid, so no fee lapse ended it. 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 25, 2006, when application 11/440,924, the earliest non-provisional in its chain, was filed (this one was filed Jul 1, 2013) | May 25, 2026 | 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 | Disclaimer resolved from the filed document (refs US 8,482,437) | resolves to May 25, 2026, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | May 25, 2026 | High confidence |
This family
| US 8,059,015 | In force Nov 2028 | Nov 2028 |
| US 8,482,437 | Term ended May 2026 | May 2026 |
| US 9,019,133 | this patent May 2026 | May 2026 |
| US 9,747,026 | Term ended May 2026 | May 2026 |
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 |
|---|---|---|---|
| Nov 14, 2013 Reel 31636, frame 105 | Cypress Semiconductor Corporation | Morgan Stanley Senior Funding, Inc. | Patent Security Agreement |
| Mar 17, 2015 Reel 35181, frame 121 | Hua, Liu; Xiaoping, Jiang | Cypress Semiconductor Corporation | Assignment of Assignor's Interest |
| Mar 21, 2015 Reel 35240, frame 429 | Cypress Semiconductor Corporation; Spansion LLC | Morgan Stanley Senior Funding, Inc. | Security Interest |
| Apr 13, 2016 Reel 38259, frame 864 | Cypress Semiconductor Corporation | Creator Technology B.V. | Assignment of Assignor's Interest |
| Nov 3, 2020 Reel 58002, frame 470 | Cypress Semiconductor Corporation; Spansion LLC | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the 8647899 Previously Recorded on Reel 035240 Frame 0429. Assignor(S) Hereby Confirms the Security Interst. |
| Apr 6, 2021 Reel 55829, frame 838 | Creator Technology B.V. | Wistron Corporation | Assignment of Assignor's Interest |
| Mar 16, 2022 Reel 59410, frame 438 | Mufg Union Bank, N.a. | Cypress Semiconductor Corporation; Spansion LLC | Release of Security Interest |
| Mar 16, 2022 reel/frame not recorded | Mufg Union Bank, N.a. | Cypress Semiconductor Corporation | Release of Security Interest |
| Mar 16, 2022 reel/frame not recorded | Mufg Union Bank, N.a. | Spansion LLC | Release of Security Interest |
| Jun 30, 2025 Reel 71755, frame 497 | Wistron Corporation | Mammoth Licensing, LLC | Assignment of Assignor's Interest |
| May 7, 2026 Reel 75567, frame 824 | Mammoth Licensing, LLC | Wistron Corporation | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,482,437, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2015 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.