US1738565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for utilizing high-frequency sound waves
Assignee: Texaco Inc
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Filing: 1927-07-18
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Granted: 1929-12-10
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Expires: 1947-07-18
Abstract
No abstract record available.
Inventors
- 👤 Claypoole Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:53
CPC Classifications
B; B01; B01F; B01F31/00; B01F31/80; B01F31/84; B01F31/841; Y; Y10; Y10S; Y10S451/00; Y10S451/91; Y10S8/00; Y10S8/12
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) | 1932-12-09 | 1933-06-10 | 1933-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-12-09 | 1937-06-10 | 1937-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-12-09 | 1941-06-10 | 1941-12-10 | $7700.00 | Window Closed / Lapsed |