US2854012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic energy apparatus
Assignee: Telephonics Corp
•
Filing: 1954-01-15
•
Granted: 1958-09-30
•
Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Alexander Murdoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:11
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US972736A
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US1665423A
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US2259260A
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US2369498A
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US2496506A
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US2527666A
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US2498990A
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US2554701A
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US2616820A
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US2604895A
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US2612860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |