Patent US2425495A successfully refreshed from Google Patents.
US2425495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way telephone system
Assignee: RCA Corp
•
Filing: 1943-10-30
•
Granted: 1947-08-12
•
Expires: 1963-10-30
Abstract
No abstract record available.
Inventors
- 👤 Bertram A Trevor
- 👤 John B Atwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
H; H04; H04M; H04M11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1406857A
Cited
US1857819A
Cited
US2167058A
Cited
US2007399A
Cited
US2059870A
Cited
US2165063A
Cited
US2034565A
Cited
US2206231A
Cited
US2223049A
Cited
US2265056A
Cited
US2289794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |