US2537173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television intercommunication system
Assignee: Rauland Borg Corp
•
Filing: 1948-02-19
•
Granted: 1951-01-09
•
Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Constantin S Szegho
- 👤 Thomas G Polanyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:05
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/257; H04N7/00; H04N7/14; H04N7/141; H04N7/142
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2102139A
Cited
US2260709A
Cited
US2206654A
Cited
DE687728C
Cited
US2157749A
Cited
US2250169A
Cited
FR866192A
Cited
US2420198A
Cited
US2438256A
Cited
US2476698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |