Term ended Apr 25, 2026 · High confidence
20-year base term ended Apr 25, 2026
Held by Versitech Limited
Filed Aug 27, 2008 as application 12/199,670 · Granted Jun 14, 2016
Base term, 20 years from filing
Today
Term ended Apr 25, 2026
2006
2026
Clock starts
Apr 25, 2006
Apr 25, 2006
Term ended
Apr 25, 2026
Apr 25, 2026
Granted
Jun 14, 2016
Jun 14, 2016
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,327,010, to Apr 25, 2026. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 25, 2006, when application 11/411,745, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2008) | Apr 25, 2026 | 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 | Disclaimer resolved from the filed document (refs US 9,327,010) | resolves to Apr 25, 2026, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Apr 25, 2026 | High confidence |
This family
| US 9,327,010 | Term ended Apr 2026 | Apr 2026 |
| US 9,162,005 | In force Feb 2030 | Feb 2030 |
| US 9,364,513 | this patent Apr 2026 | Apr 2026 |
| US 9,789,157 | Term ended Apr 2026 | Apr 2026 |
| US 11,839,694 | In force no later than Nov 2026 | no later than Nov 2026 |
| US 10,682,386 | Lapsed on the fee record Jun 2024 | Jun 2024 |
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 |
|---|---|---|---|
| Jul 16, 2012 Reel 28554, frame 443 | Ellis-behnke, Rutledge; Zhang, Shuguang; Schneider, Gerald E. | Massachusetts Institute of Technology | Nunc Pro Tunc Assignment |
| Jul 5, 2016 Reel 39252, frame 858 | Massachusetts Institute of Technology | National Institutes of Health (Nih), U.S. Dept. of Health and Human Services (DHHS), U.S. Government | Confirmatory License |
| Apr 20, 2017 Reel 42076, frame 74 | Liang, Yu-xiang; So, Kwok-fai; Tay, David | The University of Hong Kong | Assignment of Assignor's Interest |
| Apr 20, 2017 Reel 42076, frame 116 | The University of Hong Kong | Versitech Limited | Assignment of Assignor's Interest |
| Apr 20, 2017 Reel 42286, frame 107 | Ellis-behnke, Rutledge; Schneider, Gerald E.; Zhang, Shuguang | Massachusetts Institute of Technology | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,327,010, ends no earlier than this term, so it caps nothing.
Citations
43
later US patents cite this one
That is top 10% of utility patents granted in 2016 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.