Term ended Oct 23, 2026 · Low confidence
20-year base term ends Mar 13, 2028
Filed Feb 16, 2012 as application 13/397,824 · Granted Aug 13, 2024
Base term plus 994 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Term ended Oct 23, 2026
2008
2028
Clock starts
Mar 13, 2008
Mar 13, 2008
Term ended
Oct 23, 2026
Oct 23, 2026
Granted
Aug 13, 2024
Aug 13, 2024
base term
after the term ends
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
994
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,121,801.
None due
Maintenance fees
This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.
7
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 994 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. Confidence: Low. 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 13, 2008, when the earliest non-provisional application in its chain was filed (this one was filed Feb 16, 2012); a parent in its chain could not be resolved (the next row) | Mar 13, 2028 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +994 days, USPTO patent term adjustment record | Dec 2, 2030 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,121,801) | capped to Oct 23, 2026 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No maintenance fee can end the term early | term ended | High confidence |
| Further caveats on record | The record names parents not resolved: 12211447, 12075747 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Oct 23, 2026 | Low confidence |
This family
| US 7,337,081 | Lapsed on the fee record Feb 2020 | Feb 2020 |
| US 7,899,630 | Term ended Jan 2026 | Jan 2026 |
| US 8,666,688 | In force Oct 2028 | Oct 2028 |
| US 8,121,801 | Term ended Oct 2026 | Oct 2026 |
| US 8,930,153 | Term ended Jan 2026 | Jan 2026 |
| US 12,061,218 | this patent Oct 2026 | Oct 2026 |
| Application 18/741,147 | Pending not computed | not computed |
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 |
|---|---|---|---|
| Mar 9, 2023 Reel 63011, frame 269 | E.I. Electronics, Inc. Formerly Doing Business as Electro Industries/Gauge Tech | Ei Electronics LLC D/B/A Electro Industries/Gauge Tech | 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.
What's changing
Note
The 994 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,121,801.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2024 in our data have been cited yet, so we show the count and do not rank on it.
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.