US3050863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drying attapulgite clay dispersions
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1960-12-09
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Granted: 1962-08-28
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Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Aldo P Allegrini
- 👤 Tom A Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:44
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/28; C04B33/30; F; F26; F26B; F26B17/00; F26B17/28; F26B17/284; Y; Y10; Y10S; Y10S159/00; Y10S159/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD FOR DRYING ATTAPULGITE CLAY DISPERSIONS SO AS TO PRODUCE A LOW BULK DENSITY PRODUCT THEREFROM WHICH COMPRISES FORMING A FLUID DISPERSION OF ATTAPULGITE CLAY IN WATER CONTAINING A DEFLOCCULATING AGENT, WHILE MAINTAINING SAID DISPERSION IN DEFLOCCULATED CONDITION APPLYING A THIN FILM OF SAID DISPERSION TO THE OUTER SURFACE OF A ROTATING DRUM, HEATING THE INNER PERIPHERY OF SAID ROTATING DRUM WITH STEAM WHILE SIMULTANEOUSLY DIRECTLY CONTACTING SAID FILM WITH HOT DRY AIR WHICH IS AT A TEMPERATURE BELOW THAT WHICH WILL CAUSE SAID DISPERSION TO BOIL, AND REMOVING THE DRIED PRODUCT FROM THE DRUM SURFACE.
Claim 2
Independent Claim
97 words
A METHOD FOR DRYING ATTAPULGITE CLAY DISPERSIONS SO AS TO PRODUCE A LOW BULK DENSITY PRODUCT THEREFROM WHICH COMPRISES FORMING A FLUID DISPERSION OF ATTAPULGITE CLAY IN WATER CONTAINING A DEFLOCCULATING AGENT, WHILE MAINTAINING SAID DISPERSION IN DEFLOCCULATED CONDITION APPLYING A THIN FILM OF SAID DISPERSION TO THE OUTER SURFACE OF A ROTATING DRUM, HEATING THE INNER PERIPHERY OF SAID ROTATING DRUM WITH STEAM WHILE SIMULTANEOUSLY DIRECTLY CONTACTING SAID FILM WITH HOT DRY AIR WHICH IS AT A TEMPERATURE BELOW THAT WHICH WILL CAUSE SAID DISPERSION TO BOIL, AND REMOVING THE DRIED PRODUCT FROM THE DRUM SURFACE.
References Cited (Backward Citations)
US1530439A
Cited
US1756906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |