US2112430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double drive for centrifugal separators
Assignee: American Tool & Machine Co
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Filing: 1936-04-13
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Granted: 1938-03-29
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Expires: 1956-04-13
Abstract
No abstract record available.
Inventors
- 👤 Tholl John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:39
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/74; H02P5/747; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/1914; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19447
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) | 1941-03-28 | 1941-09-27 | 1942-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-28 | 1945-09-27 | 1946-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-28 | 1949-09-27 | 1950-03-29 | $7700.00 | Window Closed / Lapsed |