Term ends Sep 7, 2031 · Medium confidence
20-year base term ends Sep 7, 2031
Why Medium: A parent in the chain could not be resolved.
Filed Aug 30, 2016 as application 15/251,820 · Granted Dec 12, 2017
Base term, 20 years from filing
Today
2011
2031
Clock starts
Sep 7, 2011
Sep 7, 2011
Term ends
Sep 7, 2031
Sep 7, 2031
Granted
Dec 12, 2017
Dec 12, 2017
base term
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 8,809,772, US 9,460,900, to Sep 7, 2031. The term already ends on or before that date, so the cap shortened nothing.
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.
8
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. 2 of 3 maintenance fees are paid so far. 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 Sep 7, 2011, when application PCT/IB2011/002057, the earliest non-provisional in its chain, was filed (this one was filed Aug 30, 2016); a parent in its chain could not be resolved (the next row) | Sep 7, 2031 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,809,772, US 9,460,900) | resolves to Sep 7, 2031, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 7, 2031 | Medium confidence |
This family
| US 8,809,772 | In force Sep 2031 | Sep 2031 |
| US 9,147,562 | In force Sep 2031 | Sep 2031 |
| US 9,460,900 | In force Sep 2031 | Sep 2031 |
| US 9,842,731 | this patent Sep 2031 | Sep 2031 |
| US 10,074,527 | In force Sep 2031 | Sep 2031 |
| US 10,825,667 | In force Sep 2031 | Sep 2031 |
| US 11,107,666 | In force Sep 2031 | Sep 2031 |
7 of 8 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Aug 30, 2016 Reel 39590, frame 763 | Bonner, Ronald F.; Tate, Stephen A. | DH Technologies Development Pte. Ltd. | Assignment of Assignor's Interest |
| Aug 30, 2016 Reel 39884, frame 283 | DH Technologies Development Pte. Ltd. | DH Technologies Development Pte. Ltd. | Change of Address |
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
Sep 2031
Term ends Sep 7, 2031. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,809,772, US 9,460,900, ends no earlier than this term, so it caps nothing.
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2017 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.