Lapsed May 21, 2025 on the fee record · High confidence
20-year base term ends Jun 10, 2028
Third maintenance fee unpaid; grace period ended.
Held by Synopsys, Inc.
Filed Dec 1, 2009 as application 12/602,567 · Granted May 21, 2013
Base term, 20 years from filing, plus 681 days of patent term adjustment (USPTO delay)
Today
Lapsed May 21, 2025
2008
2030
Clock starts
Jun 10, 2008
Jun 10, 2008
No longer in force
May 21, 2025
May 21, 2025
Granted
May 21, 2013
May 21, 2013
Term would have run to
Apr 22, 2030
Apr 22, 2030
base term
patent term adjustment
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
681
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
24
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Apr 22, 2030: its 20-year base term plus 681 days of term adjustment for prosecution delay. 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 Jun 10, 2008, when application PCT/IB2008/052282, the earliest non-provisional in its chain, was filed (this one was filed Dec 1, 2009) | Jun 10, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +681 days, USPTO patent term adjustment record | Apr 22, 2030 | 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 | 2 of 3 maintenance fees paid | lapsed May 21, 2025 | High confidence |
| Computed term end | The steps above, in order | May 21, 2025 | High confidence |
This family
| US 7,877,604 | In force Jul 2027 | Jul 2027 |
| US 8,446,250 | this patent May 2025 | May 2025 |
| Application 12/602,857 | Abandoned not computed | not computed |
| Application 12/674,367 | Abandoned not computed | not computed |
| US 8,339,875 | In force Jul 2029 | Jul 2029 |
| US 8,699,714 | In force Mar 2030 | Mar 2030 |
| US 8,694,856 | In force Mar 2031 | Mar 2031 |
| US 8,819,409 | In force Apr 2031 | Apr 2031 |
8 of 24 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Dec 1, 2009 Reel 23585, frame 493 | Kursawe, Klaus; Tuyls, Pim Theo | Intrinsic Id B.V. | Assignment of Assignor's Interest |
| Jun 9, 2024 Reel 67679, frame 821 | Intrinsic Id B.V. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 681 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
21
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.