US2754693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating mechanism for centrifugal separator drive
Assignee: American Tool & Machine Co
•
Filing: 1952-09-20
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Granted: 1956-07-17
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Expires: 1972-09-20
Abstract
No abstract record available.
Inventors
- 👤 John F Tholl
- 👤 David M Tholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
B; B04; B04B; B04B9/00; B04B9/08; F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0498; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/1914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US847203A
Cited
GB221465A
Cited
DE617253C
Cited
US2149580A
Cited
US2327962A
Cited
US2551980A
Cited
CH275917A
Cited
US2649929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |