Also listed on Ilsco, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 17, 2026 · High confidence
20-year base term ended Dec 3, 2024
Held by Surge Suppression LLC
Filed Aug 21, 2008 as application 12/195,556 · Granted Jan 31, 2012
Base term plus 714 days of patent term adjustment (USPTO delay)
Today
2004
2026
Clock starts
Dec 3, 2004
Dec 3, 2004
Term ends
Nov 17, 2026
Nov 17, 2026
Granted
Jan 31, 2012
Jan 31, 2012
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
714
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.
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 714 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 Dec 3, 2004, when application 11/003,828, the earliest non-provisional in its chain, was filed (this one was filed Aug 21, 2008) | Dec 3, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +714 days, USPTO patent term adjustment record | Nov 17, 2026 | 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 | Nov 17, 2026 | High confidence |
This family
| US 7,417,841 | Term ended Dec 2025 | Dec 2025 |
| US 8,107,207 | In force Sep 2030 | Sep 2030 |
| US 8,107,208 | this patent Nov 2026 | Nov 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 |
|---|---|---|---|
| Aug 21, 2008 Reel 21421, frame 647 | Hotchkiss, Ronald; Hotchkiss, Richard, JR.; Fussell, Ricky; Haa, Andrea | Surge Suppression, Incorporated | Assignment of Assignor's Interest |
| Nov 5, 2015 Reel 36968, frame 854 | Surge Suppression, LLC | Ilsco Suppression, LLC | Assignment of Assignor's Interest |
| Nov 5, 2015 Reel 37054, frame 166 | Ilsco Suppression, LLC | Surge Suppression, LLC | Change of Name |
| Apr 23, 2020 Reel 52476, frame 699 | Surge Suppression Incorporated | Surge Suppression LLC | Assignment of Assignor's Interest |
| Apr 30, 2020 Reel 52542, frame 286 | Ilsco, LLC; Surge Suppression, LLC | Antares Capital LP, as Agent | Security Interest |
| Aug 4, 2023 Reel 64493, frame 847 | Ilsco, LLC; Surge Suppression, LLC | Antares Capital LP, as Agent | Release of Security Interest |
| Aug 25, 2023 reel/frame not recorded | Antares Capital LP, as Agent | Ilsco, LLC | Corrective Assignment to Correct the Conveying Party Data and Receiving Party Data Previously Recorded on Reel 064493 Frame 0847. Assignor(S) Hereby Confirms the Release of Security Interest. |
| Aug 25, 2023 reel/frame not recorded | Antares Capital LP, as Agent | Surge Suppression, LLC | Corrective Assignment to Correct the Conveying Party Data and Receiving Party Data Previously Recorded on Reel 064493 Frame 0847. Assignor(S) Hereby Confirms the Release of Security Interest. |
| Aug 25, 2023 Reel 64718, frame 639 | Antares Capital LP, as Agent | Ilsco, LLC; Surge Suppression, LLC | Corrective Assignment to Correct the Conveying Party Data and Receiving Party Data Previously Recorded on Reel 064493 Frame 0847. Assignor(S) Hereby Confirms the 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
Nov 2026
Term ends Nov 17, 2026. No further fees fall due before then
Note
The 714 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
17
later US patents cite this one
That is above the median of utility patents granted in 2012 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.