US2501212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver and transmitter telephone desk set
Assignee: Individual
•
Filing: 1948-11-30
•
Granted: 1950-03-21
•
Expires: 1968-11-30
Abstract
No abstract record available.
Inventors
- 👤 Fred L Cunow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:03
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842190A
Cited
US2005973A
Cited
US2071053A
Cited
US2160829A
Cited
US2214992A
Cited
US2402341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |