Term ended Jun 9, 2025 · High confidence
20-year base term ended May 25, 2025
Held by Zenith Electronics Corporation
Filed Jan 16, 2009 as application 12/355,260 · Granted Mar 19, 2013
Base term plus 15 days of patent term adjustment (USPTO delay)
Today
Term ended Jun 9, 2025
2005
2026
Clock starts
May 25, 2005
May 25, 2005
Term ended
Jun 9, 2025
Jun 9, 2025
Granted
Mar 19, 2013
Mar 19, 2013
base term
after the term ends
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
15
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,054,974, to Jun 9, 2025. The term already ends on or before that date, so the cap shortened nothing.
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.
9
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 15 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. All three maintenance fees were paid, so no fee lapse ended it. 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 25, 2005, when application 11/137,272, the earliest non-provisional in its chain, was filed (this one was filed Jan 16, 2009) | May 25, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +15 days, USPTO patent term adjustment record | Jun 9, 2025 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,054,974) | resolves to Jun 9, 2025, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Jun 9, 2025 | High confidence |
This family
| US 8,189,786 | In force Dec 2028 | Dec 2028 |
| US 7,936,870 | In force Jun 2029 | Jun 2029 |
| US 8,144,868 | In force Aug 2029 | Aug 2029 |
| US 7,929,704 | In force May 2029 | May 2029 |
| US 8,054,974 | In force Jan 2029 | Jan 2029 |
| Application PCT/US2006/019298 | PCT application no patent term | no patent term |
| US 8,401,189 | this patent Jun 2025 | Jun 2025 |
| US 8,442,226 | Term ended May 2025 | May 2025 |
8 of 9 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jan 16, 2009 Reel 22121, frame 404 | Hauge, Raymond C.; Lewis, Richard | Zenith Electronics Corporation | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 15 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,054,974, ends no earlier than this term, so it caps nothing.
Citations
4
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.