Patent US2660511A successfully refreshed from Google Patents.
US2660511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockout and recycling device for an apparatus for determining the listening habits of wave signal receiver users
Assignee: TNC US Holdings Inc
•
Filing: 1947-10-24
•
Granted: 1953-11-24
•
Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 Serge A Scherbatskoy
- 👤 Robert L Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:29
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/38; H04H60/41; H04H60/43; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2231806A
Cited
US2326737A
Cited
US2275460A
Cited
US2283523A
Cited
US2287925A
Cited
US2444151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |