US2861176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audience survey system
Assignee: Individual
•
Filing: 1954-07-29
•
Granted: 1958-11-18
•
Expires: 1974-07-29
Abstract
No abstract record available.
Inventors
- 👤 William D Horn
- 👤 Mahlon F Easterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/56; H04H60/58; H04H60/61; H04H60/66; H04H60/35; H04H60/38; H04H60/41; H04H60/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2630366A
Cited
US2678382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |