Lapsed Apr 21, 2021 on the fee record · High confidence
20-year base term ended Apr 9, 2024
Third maintenance fee unpaid; grace period ended.
Held by The Board of Trustees of the Leland Stanford Junior University and The United States Government as Represented by the Department of Veterans Affairs
Filed Apr 9, 2004 as application 10/821,807 · Granted Apr 21, 2009
Base term, 20 years from filing, plus 739 days of patent term adjustment (USPTO delay)
Today
Lapsed Apr 21, 2021
2004
2026
Clock starts
Apr 9, 2004
Apr 9, 2004
No longer in force
Apr 21, 2021
Apr 21, 2021
Granted
Apr 21, 2009
Apr 21, 2009
Term would have run to
Apr 18, 2026
Apr 18, 2026
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
739
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.
21
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 18, 2026: its 20-year base term plus 739 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 Apr 9, 2004, when this application, 10/821,807, was filed | Apr 9, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +739 days, USPTO patent term adjustment record | Apr 18, 2026 | 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 Apr 21, 2021 | High confidence |
| Computed term end | The steps above, in order | Apr 21, 2021 | High confidence |
This family
| US 7,520,848 | this patent Apr 2021 | Apr 2021 |
| US 8,052,591 | In force Dec 2028 | Dec 2028 |
| Application PCT/US2007/010262 | PCT application no patent term | no patent term |
| Application 12/185,544 | Abandoned not computed | not computed |
| US 8,267,850 | In force Mar 2031 | Mar 2031 |
| US 8,845,508 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| Application 12/701,395 | Abandoned not computed | not computed |
| US 8,956,273 | In force (reinstated) Oct 2031 | Oct 2031 |
8 of 21 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 |
|---|---|---|---|
| Oct 13, 2004 Reel 15244, frame 122 | Schneider, M. Bret; Mishelevich, David J. | The Board of Trustees of the Leland Stanford Junior University | Assignment of Assignor's Interest |
| Mar 11, 2019 Reel 48564, frame 624 | The Board of Trustees of the Leland Stanford Junior University | The Board of Trustees of the Leland Stanford Junior University; The United States Government as Represented by the Department of Veterans Affairs | Assignment of Assignor's Interest |
| Mar 11, 2019 reel/frame not recorded | The Board of Trustees of the Leland Stanford Junior University | The Board of Trustees of the Leland Stanford Junior University | Assignment of Assignor's Interest |
| Mar 11, 2019 reel/frame not recorded | The Board of Trustees of the Leland Stanford Junior University | The United States Government as Represented by the Department of Veterans Affairs | 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 739 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
182
later US patents cite this one
That is top 5% of utility patents granted in 2009 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.