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Patent US2163650A successfully refreshed from Google Patents.
US2163650A
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Means for producing high frequency compressional waves
Assignee: Individual
•
Filing: 1938-03-16
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Granted: 1939-06-27
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Expires: 1958-03-16
Abstract
No abstract record available.
Inventors
- 👤 Chester E Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0614; Y; Y10; Y10S; Y10S116/00; Y10S116/18; Y10S159/00; Y10S159/90; Y10S451/00; Y10S451/91; Y10S99/00; Y10S99/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-06-26 | 1942-12-26 | 1943-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-26 | 1946-12-26 | 1947-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-26 | 1950-12-26 | 1951-06-27 | $7700.00 | Window Closed / Lapsed |