Lapsed Mar 8, 2019 on the fee record · High confidence
20-year base term ended May 25, 2025
Second maintenance fee unpaid; grace period ended.
Held by Tahoe Research, Ltd.
Filed May 21, 2009 as application 12/470,411 · Granted Mar 8, 2011
Base term, 20 years from filing, plus 116 days of patent term adjustment (USPTO delay)
Today
Lapsed Mar 8, 2019
2005
2026
Clock starts
May 25, 2005
May 25, 2005
No longer in force
Mar 8, 2019
Mar 8, 2019
Granted
Mar 8, 2011
Mar 8, 2011
Term would have run to
Sep 18, 2025
Sep 18, 2025
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
116
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
2
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 Sep 18, 2025: its 20-year base term plus 116 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 May 25, 2005, when application 11/137,925, the earliest non-provisional in its chain, was filed (this one was filed May 21, 2009) | May 25, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +116 days, USPTO patent term adjustment record | Sep 18, 2025 | 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 | 1 of 3 maintenance fees paid | lapsed Mar 8, 2019 | High confidence |
| Computed term end | The steps above, in order | Mar 8, 2019 | High confidence |
This family
| US 7,561,567 | In force May 2027 | May 2027 |
| US 7,903,660 | this patent Mar 2019 | Mar 2019 |
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 3, 2010 Reel 25444, frame 845 | Olson, Dave; Lindahl, Gregory B.; Rubin, Jeffrey B. | Pathscale, Inc. | Assignment of Assignor's Interest |
| Dec 3, 2010 Reel 25448, frame 307 | Qlogic System Interconnect Group, Inc. | Qlogic, Corporation | Assignment of Assignor's Interest |
| Dec 3, 2010 Reel 25451, frame 743 | Pathscale, Inc. | Qlogic System Interconnect Group, Inc. | Change of Name |
| May 7, 2012 Reel 28168, frame 202 | Qlogic Corporation | Intel Corporation | Assignment of Assignor's Interest |
| Aug 15, 2022 Reel 61175, frame 176 | Intel Corporation | Tahoe Research, Ltd. | 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 116 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median 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.