Lapsed Jul 20, 2018 on the fee record · High confidence
20-year base term ended Mar 15, 2025
Second maintenance fee unpaid; grace period ended.
Held by Open Invention Network, LLC
Filed Mar 15, 2005 as application 11/080,735 · Granted Jul 20, 2010
Base term, 20 years from filing, plus 800 days of patent term adjustment (USPTO delay)
Today
Lapsed Jul 20, 2018
2005
2027
Clock starts
Mar 15, 2005
Mar 15, 2005
No longer in force
Jul 20, 2018
Jul 20, 2018
Granted
Jul 20, 2010
Jul 20, 2010
Term would have run to
May 24, 2027
May 24, 2027
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
800
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.
4
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 May 24, 2027: its 20-year base term plus 800 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 Mar 15, 2005, when this application, 11/080,735, was filed | Mar 15, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +800 days, USPTO patent term adjustment record | May 24, 2027 | 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 Jul 20, 2018 | High confidence |
| Computed term end | The steps above, in order | Jul 20, 2018 | High confidence |
This family
| US 7,761,848 | this patent Jul 2018 | Jul 2018 |
| US 9,223,546 | In force Nov 2026 | Nov 2026 |
| US 9,678,727 | Term ended Mar 2025 | Mar 2025 |
| US 10,235,142 | Term ended Mar 2025 | Mar 2025 |
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 15, 2005 Reel 16389, frame 5 | Chaffin, Mary Ellen | Southern Company Services, Inc. | Assignment of Assignor's Interest |
| Feb 11, 2008 Reel 20489, frame 60 | Southern Company Services, Inc. | Open Invention Network LLC | Assignment of Assignor's Interest |
| Oct 14, 2009 Reel 23371, frame 426 | Southern Company Services, Inc. | Open Invention Network, LLC | 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
Note
The 800 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
43
later US patents cite this one
That is top 25% of utility patents granted in 2010 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.