Term ends Jan 26, 2032 · High confidence
20-year base term ends May 8, 2031
Held by Synopsys, Inc.
Filed May 8, 2011 as application 13/103,099 · Granted Aug 27, 2013
Base term plus 263 days of patent term adjustment (USPTO delay)
Today
2011
2032
Clock starts
May 8, 2011
May 8, 2011
Term ends
Jan 26, 2032
Jan 26, 2032
Granted
Aug 27, 2013
Aug 27, 2013
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
263
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.
6
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 263 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 8, 2011, when this application, 13/103,099, was filed | May 8, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +263 days, USPTO patent term adjustment record | Jan 26, 2032 | 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 26, 2032 | High confidence |
This family
| US 8,407,647 | In force Mar 2031 | Mar 2031 |
| US 8,522,176 | this patent Jan 2032 | Jan 2032 |
| US 8,832,632 | In force Oct 2032 | Oct 2032 |
| US 8,875,081 | In force Dec 2030 | Dec 2030 |
| US 8,924,912 | In force May 2031 | May 2031 |
| US 9,665,679 | In force Dec 2030 | Dec 2030 |
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 10, 2011 reel/frame not recorded | Ho, Chia-ling; Lin, Jian-cheng; Wang, Jencheng | Springsoft USA, Inc. | Assignment of Assignor's Interest |
| May 10, 2011 reel/frame not recorded | Ho, Chia-ling; Lin, Jian-cheng; Wang, Jencheng | Springsoft, Inc. | Assignment of Assignor's Interest |
| May 10, 2011 Reel 26255, frame 864 | Ho, Chia-ling; Lin, Jian-cheng; Wang, Jencheng | Springsoft USA, Inc.; Springsoft, Inc. | Assignment of Assignor's Interest |
| Jul 17, 2013 Reel 30820, frame 490 | Springsoft USA, Inc. | Synopsys, Inc. | Assignment of Assignor's Interest |
| Jul 18, 2013 Reel 30831, frame 119 | Springsoft, Inc. | Synopsys Taiwan Co., Ltd. | Acquisition |
| Mar 31, 2016 Reel 38320, frame 364 | Synopsys Taiwan Co., Ltd. | Synopsys, 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 2032
Term ends Jan 26, 2032. No further fees fall due before then
Note
The 263 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
23
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.