Term ends Sep 24, 2034 · High confidence
20-year base term ends Sep 24, 2034
Held by Drum Workshop, Inc.
Filed Mar 26, 2018 as application 15/936,146 · Granted Nov 3, 2020
Base term, 20 years from filing
Today
2014
2034
Clock starts
Sep 24, 2014
Sep 24, 2014
Term ends
Sep 24, 2034
Sep 24, 2034
Granted
Nov 3, 2020
Nov 3, 2020
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.
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.
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. 1 of 3 maintenance fees is 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 Sep 24, 2014, when application 14/495,718, the earliest non-provisional in its chain, was filed (this one was filed Mar 26, 2018) | Sep 24, 2034 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 24, 2034 | High confidence |
This family
| US 9,589,546 | In force Oct 2034 | Oct 2034 |
| Application PCT/US2014/057383 | PCT application no patent term | no patent term |
| US 9,640,154 | In force Jan 2036 | Jan 2036 |
| US 9,472,174 | In force Sep 2034 | Sep 2034 |
| US 9,928,815 | In force Sep 2034 | Sep 2034 |
| US 10,832,642 | In force Jan 2035 | Jan 2035 |
| US 10,152,955 | In force Jan 2036 | Jan 2036 |
| US 10,825,430 | this patent Sep 2034 | Sep 2034 |
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 |
|---|---|---|---|
| Oct 6, 2020 Reel 53991, frame 805 | Sikra, Richard A. | Drum Workshop, Inc. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2034
Term ends Sep 24, 2034. Maintenance fees still fall due before then
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2020 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.