US2437282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustical transducer
Assignee: Submarine Signal Co
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Filing: 1942-11-18
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Granted: 1948-03-09
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Expires: 1962-11-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin E Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/08; B06B1/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB279878A
Cited
FR613799A
Cited
GB298382A
Cited
US2063950A
Cited
DE684213C
Cited
US2153571A
Cited
US2170206A
Cited
US2407271A
Cited
US2407329A
Cited
US2407244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |