Patent US3020683A successfully refreshed from Google Patents.
US3020683A
Expired / Lapsed
US
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Fluid ballast control system for machine for precision finishing of parts by controlled vibration
Assignee: Bell Intercontinental Corp
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Filing: 1958-10-31
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Granted: 1962-02-13
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Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 William E Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:08
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B06B1/162; B06B1/165; B24; B24B; B24B31/00; B24B31/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2370504A
Cited
US2591083A
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US2702633A
Cited
GB711531A
Cited
US2757544A
Cited
US2722840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |