US2773996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer for producing sound at microwave frequencies
Assignee: Individual
•
Filing: 1946-09-13
•
Granted: 1956-12-11
•
Expires: 1966-09-13
Abstract
No abstract record available.
Inventors
- 👤 Slater John Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:45
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0651
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2174701A
Cited
US2217280A
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US2280226A
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US2404226A
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US2427100A
Cited
US2409321A
Cited
US2413939A
Cited
US2463472A
Cited
US2414456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |