US2933940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced-torque drive of a rotary system at cyclically continuously varying velocity
Assignee: HALLDEN MACHINE Co
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Filing: 1957-07-01
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Granted: 1960-04-26
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Karl W Hallden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
B; B23; B23D; B23D36/00; B23D36/0008; B23D36/0033; B23D36/0041; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19884; Y10T74/21; Y10T74/211; Y10T74/2111; Y10T83/00; Y10T83/465; Y10T83/4737; Y10T83/4766; Y10T83/4775
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |