US3513420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetodynamic actuator
Assignee: Allis Chalmers Corp
•
Filing: 1967-12-20
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Granted: 1970-05-19
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Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 James C W Ransom
- 👤 Joseph W Griffith
- 👤 Albert M Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H01H3/00; H01H3/22; H01H3/28; H01H33/02; H01H33/28; H01H33/285; H01H33/662; H01H33/66238; H01H2033/66246; H01H3/60; H01H33/6662
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) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |