Patent US2726294A successfully refreshed from Google Patents.
Patent US3282435A successfully refreshed from Google Patents.
US3282435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay filter aid and production thereof
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1963-10-15
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Granted: 1966-11-01
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Morris M Goldberg
- 👤 Aldo P Allegrini
- 👤 Tom A Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:47
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A METHOD FOR MAKING A FILLER AID POWDER FROM ATTAPULGITE CLAY WHEREIN A SMALL AMOUNT COLLOIDAL ATTAPULGITE CLAY IS STRONGLY AGITATED IN AN AQUEOUS SOLUTION OF A POLYPHOSPHATE DISPERING AGENT TO FORM A DEFLOCCULATED CLAY SLIP AND THE SLIP IS DRIED QUIESCENTLY, GROUND AND THEN CALCINED TO DEHYDRATE THE CLAY, THE IMPROVEMENT WHICH COMPRISES CENTRIFUGING THE DEFLOCCULATED SLIP AT 15 PERCENT TO 22 PERCENT CLAY SOLIDS AT A SPEED AND FOR A TIME SUFFICIENT TO EFFECT A SEPARATION OF THE SLIP INTO A FINER SUSPENDED FRACTION CONTAINING PARTICLES SUBSTANTIALLY ALL OF WHICH ARE FINER THAN 2..5 MICRONS, AND INTO A FRACTION CONTAINING LARGER PARTICLES, SEPARATING THE FRACTIONS, DISCARDING SAID FRACTION CONTAINING LARGER PARTICLES AND SUBJECTING SAID FINER SUSPENDED FRACTION TO SAID QUIESCENT DRYING, GRINDING AND CALCINING.
Claim 2
Dependent Claim
127 words
IN A METHOD FOR MAKING A FILLER AID POWDER FROM ATTAPULGITE CLAY WHEREIN A SMALL AMOUNT COLLOIDAL ATTAPULGITE CLAY IS STRONGLY AGITATED IN AN AQUEOUS SOLUTION OF A POLYPHOSPHATE DISPERING AGENT TO FORM A DEFLOCCULATED CLAY SLIP AND THE SLIP IS DRIED QUIESCENTLY, GROUND AND THEN CALCINED TO DEHYDRATE THE CLAY, THE IMPROVEMENT WHICH COMPRISES CENTRIFUGING THE DEFLOCCULATED SLIP AT 15 PERCENT TO 22 PERCENT CLAY SOLIDS AT A SPEED AND FOR A TIME SUFFICIENT TO EFFECT A SEPARATION OF THE SLIP INTO A FINER SUSPENDED FRACTION CONTAINING PARTICLES SUBSTANTIALLY ALL OF WHICH ARE FINER THAN 2..5 MICRONS, AND INTO A FRACTION CONTAINING LARGER PARTICLES, SEPARATING THE FRACTIONS, DISCARDING SAID FRACTION CONTAINING LARGER PARTICLES AND SUBJECTING SAID FINER SUSPENDED FRACTION TO SAID QUIESCENT DRYING, GRINDING AND CALCINING.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |