Lapsed Feb 7, 2025 on the fee record · High confidence
20-year base term ended Sep 27, 2026
Second maintenance fee unpaid; grace period ended.
Held by Daramic LLC
Filed Sep 27, 2006 as application 11/535,701 · Granted Feb 7, 2017
Base term, 20 years from filing, plus 1442 days of patent term adjustment (USPTO delay)
Today
Lapsed Feb 7, 2025
2006
2030
Clock starts
Sep 27, 2006
Sep 27, 2006
No longer in force
Feb 7, 2025
Feb 7, 2025
Granted
Feb 7, 2017
Feb 7, 2017
Term would have run to
Sep 8, 2030
Sep 8, 2030
base term
patent term adjustment
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
1,442
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
3
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Sep 8, 2030: its 20-year base term plus 1442 days of term adjustment for prosecution delay. 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 Sep 27, 2006, when this application, 11/535,701, was filed | Sep 27, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1442 days, USPTO patent term adjustment record | Sep 8, 2030 | 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 | 1 of 3 maintenance fees paid | lapsed Feb 7, 2025 | High confidence |
| Computed term end | The steps above, in order | Feb 7, 2025 | High confidence |
This family
| US 9,564,623 | this patent Feb 2025 | Feb 2025 |
| US 10,361,416 | In force Nov 2026 | Nov 2026 |
| US 11,450,924 | Lapsed on the fee record Sep 2026 | Sep 2026 |
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 27, 2006 Reel 18314, frame 121 | Miller, Eric Henri; Timmons, John Randolph; Whear, John Kevin | Daramic LLC | Assignment of Assignor's Interest |
| Apr 8, 2014 Reel 32631, frame 795 | Daramic, LLC (F/K/A Daramic, Inc.) | Bank of America, N.A., as Administrative Agent | Patent Security Agreement |
| Aug 28, 2015 Reel 36502, frame 654 | Bank of America, N.A., as Administrative Agent | Daramic, LLC (F/K/A/ Daramic, Inc.) | Termination and Release of Security Interest in United States Patents |
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
Note
The 1442 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
16
later US patents cite this one
That is top 25% 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.