US2620437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diversity receiver indicator circuit
Assignee: RCA Corp
•
Filing: 1950-10-09
•
Granted: 1952-12-02
•
Expires: 1970-10-09
Abstract
No abstract record available.
Inventors
- 👤 Amedeo D Zappacosta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:55
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874866A
Cited
US2004126A
Cited
US1901117A
Cited
US2130485A
Cited
US2296089A
Cited
US2451584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |