Surrendered on reissue Sep 10, 2013 · Medium confidence
20-year base term ended Jun 27, 2022
Surrendered on reissue Sep 10, 2013 · its term and maintenance fees continue in US RE44,483.
Filed Nov 16, 2005 as application 11/280,619 · Granted Nov 9, 2010
Base term, 20 years from filing, plus 723 days of patent term adjustment (USPTO delay)
Today
Surrendered Sep 10, 2013
2002
2026
Clock starts
Jun 27, 2002
Jun 27, 2002
No longer in force
Sep 10, 2013
Sep 10, 2013
Granted
Nov 9, 2010
Nov 9, 2010
Term would have run to
Jun 19, 2024
Jun 19, 2024
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
723
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
0 of 3
Maintenance fees paid
Fees paid on this patent before its reissue. Those after fall due on the reissue, which carries the term on.
3
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 723 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Jun 27, 2002, when application 10/186,298, the earliest non-provisional in its chain, was filed (this one was filed Nov 16, 2005) | Jun 27, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +723 days, USPTO patent term adjustment record | Jun 19, 2024 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | no change | High confidence |
| Reissue | US RE44,483 issued Sep 10, 2013, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Sep 10, 2013 | High confidence |
| Surrendered on reissue | The steps above, in order | Sep 10, 2013 | Medium confidence |
This family
| US 6,996,173 | Term ended Apr 2024 | Apr 2024 |
| US 7,830,958 | this patent no later than Sep 2013 | no later than Sep 2013 |
| US 8,005,138 | In force Nov 2026 | Nov 2026 |
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 |
|---|---|---|---|
| Sep 10, 2010 Reel 24969, frame 323 | Wu, Feng; Li, Shipeng; Sun, Xiaoyan; Zhang, Ya-qin | Microsoft Corporation | Assignment of Assignor's Interest |
| Dec 9, 2014 Reel 34543, frame 1 | Microsoft 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.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 723 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 10, 2013. We will not guess the cap.
Citations
3
later US patents cite this one
That is below the median 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.