US2755767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power generators of sounds and ultra-sounds
Assignee: Centre National de la Recherche Scientifique
•
Filing: 1952-07-09
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Granted: 1956-07-24
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Expires: 1972-07-09
Abstract
No abstract record available.
Inventors
- 👤 Levavasseur Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
G; G10; G10K; G10K5/00; G10K5/02; Y; Y10; Y10S; Y10S116/00; Y10S116/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1515471A
Cited
US1881211A
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US2142184A
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US2424375A
Cited
US2570081A
Cited
US2528026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |