Collateral for a security interest recorded Jul 7, 2020 (The Toronto-Dominion Bank).
Term ends Mar 19, 2039 · High confidence
20-year base term ends May 29, 2038
Held by Specialized Desanders Inc.
Filed Jul 5, 2018 as application 16/027,577 · Granted Oct 20, 2020
Base term plus 294 days of patent term adjustment (USPTO delay)
Today
2018
2039
Clock starts
May 29, 2018
May 29, 2018
Term ends
Mar 19, 2039
Mar 19, 2039
Granted
Oct 20, 2020
Oct 20, 2020
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
294
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.
This patent's term runs 294 days past its 20-year base term on 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 May 29, 2018, when application 15/991,771, the earliest non-provisional in its chain, was filed (this one was filed Jul 5, 2018) | May 29, 2038 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +294 days, USPTO patent term adjustment record | Mar 19, 2039 | 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 | Mar 19, 2039 | High confidence |
This family
| US 11,035,216 | In force Aug 2039 | Aug 2039 |
| US 10,967,305 | In force Jun 2039 | Jun 2039 |
| US 10,807,020 | this patent Mar 2039 | Mar 2039 |
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 |
|---|---|---|---|
| Aug 21, 2018 Reel 46645, frame 966 | Hemstock, Christopher A. | Specialized Desanders Inc. | Nunc Pro Tunc Assignment |
| Jul 7, 2020 Reel 53139, frame 623 | Specialized Desanders Inc. | The Toronto-Dominion Bank | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Mar 2039
Term ends Mar 19, 2039. Maintenance fees still fall due before then
Note
The 294 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 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.