US2848540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier-wave transmitting and receiving apparatus
Assignee: Individual
•
Filing: 1953-02-16
•
Granted: 1958-08-19
•
Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 John R Cooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981342A
Cited
US2086465A
Cited
US2026357A
Cited
US2114718A
Cited
US2229674A
Cited
US2143563A
Cited
US2459675A
Cited
US2528206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |