Also listed on Envisics Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 20, 2033 · High confidence
20-year base term ends Dec 20, 2033
Held by Dualitas Ltd.
Filed Aug 22, 2017 as application 15/683,443 · Granted Mar 12, 2019
Base term, 20 years from filing
Today
2013
2033
Clock starts
Dec 20, 2013
Dec 20, 2013
Term ends
Dec 20, 2033
Dec 20, 2033
Granted
Mar 12, 2019
Mar 12, 2019
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 9,766,456, to Dec 20, 2033. 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.
7
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: 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 Dec 20, 2013, when application PCT/GB2013/053403, the earliest non-provisional in its chain, was filed (this one was filed Aug 22, 2017) | Dec 20, 2033 | 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 9,766,456) | resolves to Dec 20, 2033, 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 | Dec 20, 2033 | High confidence |
This family
| US 9,766,456 | In force Jan 2034 | Jan 2034 |
| US 10,228,559 | this patent Dec 2033 | Dec 2033 |
| US 11,054,643 | In force Dec 2033 | Dec 2033 |
| US 12,013,533 | In force no later than Jan 2035 | no later than Jan 2035 |
| US 12,345,884 | In force Dec 2033 | Dec 2033 |
| Application 19/250,172 | Pending not computed | not computed |
6 of 7 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 |
|---|---|---|---|
| Sep 13, 2017 Reel 43580, frame 776 | Christmas, Jamieson; Masiyano, Dackson | Two Trees Photonics Limited | Assignment of Assignor's Interest |
| Sep 13, 2017 Reel 43580, frame 779 | Two Trees Photonics Limited | Daqri Holographics Limited | Assignment of Assignor's Interest |
| Feb 1, 2019 Reel 48272, frame 214 | Two Trees Photonics Limited | Two Trees Photonics Limited | Corrective Assignment to Correct the Assignee Name Previously Recorded at Reel: 043580 Frame: 0779. Assignor(S) Hereby Confirms the Assignment. |
| Dec 8, 2020 Reel 54581, frame 939 | Two Trees Photonics Ltd. | Envisics Ltd. | Assignment of Assignor's Interest |
| Aug 5, 2026 Reel 76113, frame 595 | Envisics Ltd. | Dualitas Ltd. | 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.
What's changing
Dec 2033
Term ends Dec 20, 2033. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,766,456, ends no earlier than this term, so it caps nothing.
Citations
34
later US patents cite this one
That is top 10% of utility patents granted in 2019 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.