Patent US4744788A successfully refreshed from Google Patents.
Patent US3606182A successfully refreshed from Google Patents.
US3606182A
Expired / Lapsed
US
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Crushing chamber for a centrifugal impact rock crushing machine
Assignee: Portec Inc
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Filing: 1969-02-27
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Granted: 1971-09-20
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Expires: 1989-02-27
Abstract
Abstract A CRUSHING CHAMBER FOR A CENTRIFUGAL IMPACT ROCK CRUSHING MACHINE IS DESCRIBED, HAVING A ROTATABLE TURNTABLE FOR ACCELERATING THE ROCK TO HIGH VELOCITIES AND THEN DISCHARGING THE ROCK AGAINST INDEPENDENT WEAR RESISTANT IMPACT BLOCKS CIRCUMSCRIBING THE TURNTABLE.
Inventors
- 👤 Donald R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:27
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807; B02C13/1814; B02C13/26; B02C13/28; B02C13/2804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |