US3204769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Associated Portland Cement Manufacturers Ltd
•
Filing: 1962-11-23
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Granted: 1965-09-07
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Davis Geoffrey George John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:23
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/32; B01D25/322; B01D25/12; B01D25/172; B01D25/28; B01D25/282; B01D25/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
A ROTARY FILTER PRESS APPARATUS COMPRISING A SUBSTANTIALLY CIRCULAR ROTATABLY MOUNTED TURNTABLE; A SERIES OF ANGULARLY SPACED FILTER PRESS UNITS CARRIED BY SAID TURNTABLE, EACH FILTER PRESS UNIT INCLUDING A FIRST TRACK GUIDE MEANS SUPPORTED ON SAID TURNTABLE AND EXTENDING RADIALLY IN RELATION TO THE TURNTABLE WITH THE OUTER ENDS OF EACH OF SAID FIRST TRACK GUIDE MEANS LYING AT THE CIRCUMFERENCE OF A CIRCLE WHOSE CENTER COINCIDES WITH THAT OF SAID TURNTABLE, AND A PLURALITY OF FILTER PLATES INCLUDING A RADIALLY OUTERMOST FILTER PLATE MOUNTED ON EACH OF SAID FIRST TRACK GUIDE MEANS FOR MOVEMENT RADILLY THEREON IN RELATION TO SAID TURNTABLE; A STATIONARY RUNWAY EXTENSION ADJACENT THE TURNTABLE INCLUDING FURTHER TRACK GUIDE MEANS RADIALLY EXTENDING WITH RESPECT TO THE CENTER OF THE TURNTABLE WITH THE INNER END OF SAID FURTHER TRACK GUIDE MEANS LYING AT THE CIRCUMFERENCE OF THE SAME SAID CIRCLE, SAID FURTHER TRACK GUIDE MEANS ON SAID STATIONARY RUNWAY EXTENSION AND THE FIRST TRACK GUIDE MEANS ON ONE OF SAID FILTER PRESS UNITS BEING ALIGNED TO FORM A CONTINUOUS TRACK WHEN SAID FILTER PRESS UNIT IS IN A PREDETERMINED POSITION OPPOSITE SAID STATIONARY RUNWAY EXTENSION; MEANS FOR IMPARTING ROTARY MOVEMENT TO SAID TURNTABLE; MEANS FOR IMPARTING PRESS UNITS SUCCESSIVELY TO SAID POSITION WHEREIN SUCCESSSIVE ONES OF SAID FIRST TRACK GUIDE MEANS ARE SUCCESSIVELY
Claim 2
Dependent Claim
217 words
A ROTARY FILTER PRESS APPARATUS COMPRISING A SUBSTANTIALLY CIRCULAR ROTATABLY MOUNTED TURNTABLE; A SERIES OF ANGULARLY SPACED FILTER PRESS UNITS CARRIED BY SAID TURNTABLE, EACH FILTER PRESS UNIT INCLUDING A FIRST TRACK GUIDE MEANS SUPPORTED ON SAID TURNTABLE AND EXTENDING RADIALLY IN RELATION TO THE TURNTABLE WITH THE OUTER ENDS OF EACH OF SAID FIRST TRACK GUIDE MEANS LYING AT THE CIRCUMFERENCE OF A CIRCLE WHOSE CENTER COINCIDES WITH THAT OF SAID TURNTABLE, AND A PLURALITY OF FILTER PLATES INCLUDING A RADIALLY OUTERMOST FILTER PLATE MOUNTED ON EACH OF SAID FIRST TRACK GUIDE MEANS FOR MOVEMENT RADILLY THEREON IN RELATION TO SAID TURNTABLE; A STATIONARY RUNWAY EXTENSION ADJACENT THE TURNTABLE INCLUDING FURTHER TRACK GUIDE MEANS RADIALLY EXTENDING WITH RESPECT TO THE CENTER OF THE TURNTABLE WITH THE INNER END OF SAID FURTHER TRACK GUIDE MEANS LYING AT THE CIRCUMFERENCE OF THE SAME SAID CIRCLE, SAID FURTHER TRACK GUIDE MEANS ON SAID STATIONARY RUNWAY EXTENSION AND THE FIRST TRACK GUIDE MEANS ON ONE OF SAID FILTER PRESS UNITS BEING ALIGNED TO FORM A CONTINUOUS TRACK WHEN SAID FILTER PRESS UNIT IS IN A PREDETERMINED POSITION OPPOSITE SAID STATIONARY RUNWAY EXTENSION; MEANS FOR IMPARTING ROTARY MOVEMENT TO SAID TURNTABLE; MEANS FOR IMPARTING PRESS UNITS SUCCESSIVELY TO SAID POSITION WHEREIN SUCCESSSIVE ONES OF SAID FIRST TRACK GUIDE MEANS ARE SUCCESSIVELY
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |