Also listed on Cubic Tech Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jun 24, 2031 · High confidence
20-year base term ends Jun 24, 2031
Held by DSM Protective Materials B.V.
Filed May 23, 2016 as application 15/162,211 · Granted Apr 17, 2018
Base term, 20 years from filing
Today
2011
2031
Clock starts
Jun 24, 2011
Jun 24, 2011
Term ends
Jun 24, 2031
Jun 24, 2031
Granted
Apr 17, 2018
Apr 17, 2018
base term
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.
4
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. 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 Jun 24, 2011, when application 13/168,912, the earliest non-provisional in its chain, was filed (this one was filed May 23, 2016) | Jun 24, 2031 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Jun 24, 2031 | High confidence |
This family
| US 8,784,968 | In force Feb 2032 | Feb 2032 |
| Application PCT/US2011/041914 | PCT application no patent term | no patent term |
| US 9,358,755 | In force Nov 2031 | Nov 2031 |
| US 9,944,042 | this patent Jun 2031 | Jun 2031 |
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 29, 2016 Reel 39287, frame 828 | Adams, Christopher Michael; Downs, Roland Joseph; McDaniels, Keith Joel | Cubic Tech Corporation | Assignment of Assignor's Interest |
| Oct 28, 2022 Reel 61579, frame 501 | Cubic Tech Corporation | Wells Fargo Capital Finance, LLC, as Agent | Security Interest |
| Oct 28, 2022 Reel 61799, frame 424 | Cubic Tech Corporation | Citibank, N.A., as Administrative Agent | Security Agreement |
| May 4, 2023 Reel 63540, frame 203 | Cubic Tech Corporation | DSM IP Assets B.V. | Assignment of Assignor's Interest |
| Sep 30, 2023 Reel 65082, frame 600 | DSM IP Assets B.V. | DSM Protective Materials B.V. | Assignment of Assignor's Interest |
| Jun 24, 2025 Reel 71704, frame 194 | Wells Fargo Capital Finance, LLC, as Administrative Agent | Cubic Tech Corporation | Release of Security Interests in Patents Recorded at Reel 061579, Frame 0501. |
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
Jun 2031
Term ends Jun 24, 2031. Maintenance fees still fall due before then
Citations
4
later US patents cite this one
That is above the median of utility patents granted in 2018 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.