Patent US2717698A successfully refreshed from Google Patents.
US2717698A
Expired / Lapsed
US
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Automatic balancing device for rotating cylinders
Assignee: US Hoffman Machinery Corp
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Filing: 1952-12-13
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Granted: 1955-09-13
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Expires: 1972-12-13
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Francis Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:38
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/20; D06F37/22; D06F37/225; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2109; Y10T74/211; Y10T74/2111; Y10T74/2112
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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |