Patent US2885873A successfully refreshed from Google Patents.
US2885873A
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Torque limiting magnetic coupling
Assignee: FRONTIER DEV Co
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Filing: 1957-06-24
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Granted: 1959-05-12
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Expires: 1977-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John T Beeston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/67; A01D34/68; A01D34/6806; H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/108; A01D2034/6837; A01D2101/00
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |