US3457531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced latch mechanism
Assignee: Allis Chalmers Corp
•
Filing: 1967-06-05
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Granted: 1969-07-22
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Expires: 1987-06-05
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Goodwin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:59
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/3031; H01H71/00; H01H71/10; H01H71/1054; H01H2071/1063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2794881A
Cited
US2866031A
Cited
US3106137A
Cited
US2961510A
Cited
US3329912A
Cited
US3329913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |