Also listed on Wilson Wolf Manufacturing Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jun 4, 2031 · High confidence
20-year base term ends Mar 1, 2030
Held by Wheaton Industries, Inc.
Filed Mar 1, 2010 as application 12/715,191 · Granted Aug 6, 2013
Base term plus 460 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Mar 1, 2010
Mar 1, 2010
Term ends
Jun 4, 2031
Jun 4, 2031
Granted
Aug 6, 2013
Aug 6, 2013
base term
patent term adjustment
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
460
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
This patent's term runs 460 days past its 20-year base term on 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 Mar 1, 2010, when this application, 12/715,191, was filed | Mar 1, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +460 days, USPTO patent term adjustment record | Jun 4, 2031 | 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 | Jun 4, 2031 | High confidence |
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 |
|---|---|---|---|
| Apr 18, 2011 Reel 26144, frame 49 | Wilson, John R.; Welch, Daniel P.; Robeck, Alison; Page, Douglas A. | Wilson Wolf Manufacturing Corporation | Assignment of Assignor's Interest |
| Jul 12, 2012 Reel 28533, frame 917 | Wilson Wolf Manufacturing Corporation | Wheaton Industries, Inc. | Assignment of Assignor's Interest |
| Jul 16, 2012 Reel 28557, frame 483 | Wheaton Industries, Inc. | Madison Capital Funding LLC, as Agent | Security Agreement |
| Jun 29, 2015 Reel 36033, frame 227 | Madison Capital Funding LLC, as Agent | Wheaton Industries, Inc. | Release of Security Interest |
| Apr 3, 2017 Reel 41835, frame 477 | Duran, Inc.; Wheaton Industries, Inc. | Glas Trust Corporation Limited, as Security Agent | Security Interest |
| Dec 10, 2025 Reel 73175, frame 935 | Glas Trust Corporation Limited | Wheaton Industries, Inc.; Duran, Inc. | Release of Security Interest |
| Dec 10, 2025 reel/frame not recorded | Glas Trust Corporation Limited | Wheaton Industries, Inc. | Release of Security Interest |
| Dec 10, 2025 reel/frame not recorded | Glas Trust Corporation Limited | Duran, Inc. | Release of Security 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
Jun 2031
Term ends Jun 4, 2031. No further fees fall due before then
Note
The 460 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median 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.