Patent US3538803A successfully refreshed from Google Patents.
US3538803A
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US
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Cavitation machining apparatus
Assignee: Calspan Corp
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Filing: 1969-04-03
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Granted: 1970-11-10
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Expires: 1989-04-03
Abstract
No abstract record available.
Inventors
- 👤 Phillip J Joseph
- 👤 Paul Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:20
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/005; B01; B01J; B01J19/00; B01J19/08; B01J19/10; B24B; B24B31/00; B24C1/00; B24C1/04; B01J2219/00; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1942; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/97
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |