US2932401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspended centrifugal apparatus
Assignee: American Tool & Machine Co
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Filing: 1957-06-13
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Granted: 1960-04-12
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Expires: 1977-06-13
Abstract
No abstract record available.
Inventors
- 👤 David M Tholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B04B11/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |