Term ends Apr 23, 2028 · Medium confidence
20-year base term ended Sep 14, 2026
Why Medium: A parent in the chain could not be resolved.
Held by Cymer, LLC
Filed Oct 30, 2007 as application 11/981,450 · Granted Aug 16, 2011
Base term plus 587 days of patent term adjustment (USPTO delay)
Today
2006
2028
Clock starts
Sep 14, 2006
Sep 14, 2006
Term ends
Apr 23, 2028
Apr 23, 2028
Granted
Aug 16, 2011
Aug 16, 2011
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
587
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.
23
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 587 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. 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 14, 2006, when applications 11/521,833, 11/521,834, 11/521,835, 11/521,858, 11/521,860, 11/521,904, 11/521,905, 11/521,906 and 11/522,052, the earliest non-provisional applications in its chain, were filed (this one was filed Oct 30, 2007); a parent in its chain could not be resolved (the next row) | Sep 14, 2026 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +587 days, USPTO patent term adjustment record | Apr 23, 2028 | 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 | Apr 23, 2028 | Medium confidence |
This family
| Application 11/522,052 | Abandoned not computed | not computed |
| Application 11/521,835 | Abandoned not computed | not computed |
| US 7,885,309 | In force Apr 2029 | Apr 2029 |
| US 7,822,092 | In force Nov 2026 | Nov 2026 |
| US 7,999,915 | this patent Apr 2028 | Apr 2028 |
| US 7,746,913 | In force Jun 2027 | Jun 2027 |
| US 7,920,616 | In force Sep 2027 | Sep 2027 |
| US 7,778,302 | In force Jan 2027 | Jan 2027 |
8 of 23 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 |
|---|---|---|---|
| Mar 3, 2008 Reel 20588, frame 310 | Ershov, Alexander I.; Partlo, William N.; Brown, Daniel J.w.; Fomenkov, Igor V.; Bergstedt, Robert A.; Lalovic, Ivan | Cymer, Inc. | Assignment of Assignor's Interest |
| Mar 12, 2014 Reel 32420, frame 153 | Cymer, Inc. | Cymer, LLC | Merger |
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
Apr 2028
Term ends Apr 23, 2028. No further fees fall due before then
Note
The 587 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
33
later US patents cite this one
That is top 25% of utility patents granted in 2011 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.