Patent US2855993A successfully refreshed from Google Patents.
US2855993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and apparatus for determining the listening or viewing habits of wave signal receiver users
Assignee: TNC US Holdings Inc
•
Filing: 1954-03-19
•
Granted: 1958-10-14
•
Expires: 1974-03-19
Abstract
No abstract record available.
Inventors
- 👤 Henry A Rahmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:25
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/29; H04H60/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2482615A
Cited
US1505198A
Cited
US1808167A
Cited
US1981860A
Cited
US2080330A
Cited
US2368761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |