Lapsed Apr 16, 2025 on the fee record · High confidence
20-year base term ends Oct 26, 2027
Third maintenance fee unpaid; grace period ended.
Filed Apr 4, 2012 as application 13/439,622 · Granted Apr 16, 2013
Base term, 20 years from filing
Today
Lapsed Apr 16, 2025
2007
2027
Clock starts
Oct 26, 2007
Oct 26, 2007
No longer in force
Apr 16, 2025
Apr 16, 2025
Granted
Apr 16, 2013
Apr 16, 2013
Term would have run to
Oct 26, 2027
Oct 26, 2027
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
5
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 Oct 26, 2027: its 20-year base term, with no 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 Oct 26, 2007, when application 11/977,884, the earliest non-provisional in its chain, was filed (this one was filed Apr 4, 2012) | Oct 26, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 16, 2025 | High confidence |
| Computed term end | The steps above, in order | Apr 16, 2025 | High confidence |
This family
| US 8,175,418 | Lapsed on the fee record May 2020 | May 2020 |
| US 8,422,833 | this patent Apr 2025 | Apr 2025 |
| US 8,761,546 | Lapsed on the fee record Jun 2026 | Jun 2026 |
| US 9,092,374 | In force Oct 2027 | Oct 2027 |
| US 9,696,921 | Lapsed on the fee record Jul 2025 | Jul 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 |
|---|---|---|---|
| Apr 4, 2012 Reel 27990, frame 336 | Keith Jr., Robert O. | Maxsp Corporation | Assignment of Assignor's Interest |
| Jul 21, 2015 Reel 36148, frame 889 | New Checkerboard Cattle and Computer Corporation | Maxsp Corporation | Change of Name |
| Jul 21, 2015 Reel 36163, frame 82 | Maxsp Corporation | Goodrich, John B. | Nunc Pro Tunc Confirmatory Assignment with an Effective Date of 7/1/2008 Which Confirms the Agreement of Sale Executed on 7/1/2008 from Maxsp Corporation to John B. Goodrich |
| Jul 21, 2015 Reel 36163, frame 287 | Goodrich, John B. | New Checkerboard Cattle and Computer Corporation | Nunc Pro Tunc Confirmatory Assignment with an Effective Date of 7/1/2008 Which Confirms the Bill of Sale Executed on 9/12/2008 from John B. Goodrich to New Checkerboard Cattle and Computer Corporation |
| Jul 23, 2015 Reel 36168, frame 302 | Maxsp Corporation | Microsoft Technology Licensing, 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.
Citations
25
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.