US2613261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater transducer
Assignee: Individual
•
Filing: 1948-12-08
•
Granted: 1952-10-07
•
Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:32
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0681
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985251A
Cited
US2076330A
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US2138036A
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US2414489A
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US2413462A
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US2417829A
Cited
US2405605A
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US2435548A
Cited
US2440903A
Cited
US2456294A
Cited
US2480535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |