US2352918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way telephone and telegraph system
Assignee: RCA Corp
•
Filing: 1942-10-30
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Granted: 1944-07-04
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Expires: 1962-10-30
Abstract
No abstract record available.
Inventors
- 👤 Smith J Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/08; H04M11/00; H04M11/06; H04M11/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-07-04 | 1948-01-03 | 1948-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-04 | 1952-01-03 | 1952-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-04 | 1956-01-03 | 1956-07-04 | $7700.00 | Window Closed / Lapsed |