Also listed on Cubic Tech Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 3, 2031 · High confidence
20-year base term ends Aug 3, 2031
Held by DSM Protective Materials B.V.
Filed Aug 3, 2011 as application 13/197,741 · Granted Jan 1, 2013
Base term, 20 years from filing
Today
2011
2031
Clock starts
Aug 3, 2011
Aug 3, 2011
Term ends
Aug 3, 2031
Aug 3, 2031
Granted
Jan 1, 2013
Jan 1, 2013
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.
3 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. All three maintenance fees are recorded paid; no more fees are due. 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 Aug 3, 2011, when this application, 13/197,741, was filed | Aug 3, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 3, 2031 | High confidence |
This family
| US 8,343,574 | this patent Aug 2031 | Aug 2031 |
| US 8,802,189 | In force Aug 2031 | Aug 2031 |
| US 9,079,218 | In force Aug 2031 | Aug 2031 |
| US 9,339,842 | In force Aug 2031 | Aug 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 |
|---|---|---|---|
| Dec 15, 2011 Reel 27392, frame 176 | Downs, Roland Joseph; Adams, Christopher Michael; Holweger, Jon Michael | 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
Aug 2031
Term ends Aug 3, 2031. No further fees fall due before then
Citations
30
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.