Patent US3397846A successfully refreshed from Google Patents.
US3397846A
Expired / Lapsed
US
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Hydraulic release for gyratory crushers
Assignee: Individual
•
Filing: 1966-12-02
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Granted: 1968-08-20
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Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Archer Fred Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/02; B02C2/04; B02C2/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2679984A
Cited
US3019994A
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US3162387A
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US3038670A
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US3009660A
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US3133708A
Cited
US3140835A
Cited
US3204883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |