Patent US3158568A successfully refreshed from Google Patents.
US3158568A
Expired / Lapsed
US
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Gyratory screen tensioning means
Assignee: State Steel Products Inc
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Filing: 1961-08-21
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Granted: 1964-11-24
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Holman Lee Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:40
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48; B07B1/28; B07B1/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
IN COMBINATION WITH A GYRATORY SEPARATOR HAVING A GENERALLY CIRCULAR SCREEN FABRIC MEANS CONNECTED WITH A PERIPHERAL FRAME MEMBER OF A RESILENTLY SUPPORTED SCREEN FRAME, SAID SCREEN FRAME HAVING A BOTTOM MEMBER EXTENDING THEREACROSS IN FIXED RELATION TO THE PERIPHERAL FRAME MEMBER, SAID CIRCULAR SCREEN FABRIC MEANS HAVING A CENTRAL OPENING THEREIN, THE PROVISION OF A SCREEN TENSION BOLT FIXED TO SAID BOTTOM MEMBER, EXTENDING AXIALLY OF SAID FRAME, AND THROUGH SAID CENTRAL OPENING; MEANS OPERABLY CONNECTING SAID BOLT WITH SAID SCREEN FABRIC MEANS AT SAID OPENING INCLUDING A VIRTUALLY RIGID MEANS TRANSVERSELY EXTENDING ACROSS SAID OPENING AND CONNECTED TO SAID SCREEN FABRIC MEANS; ELONGATED SLEEVE MEANS RECEIVING SAID BOLT THERETHROUGH AND SUPPORTED BY SAID RIGID MEANS, SAID ELONGATED SLEEVE MEANS INCLUDING
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |