Patent US2945708A successfully refreshed from Google Patents.
Patent US3244635A successfully refreshed from Google Patents.
US3244635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbent products and method for making same from attapulgite clay
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1962-09-10
•
Granted: 1966-04-05
•
Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 James B Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:53
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR MAKING HARD LIGHTWEIGHT CLAY SORBENT AGGREGATES WHICH COMPRISES: FORMING A MOIST PLASTIC MIXTURE COMPRISING COLLOIDAL ATTAPULGITE CLAY AND WATER, WITHOUT HEATING, CONTINUOUSLY FEEDING SAID MIXTURE BETWEEN THE PERIPHERAL SURFACES OF HARD AND SMOOTH SURFACED COUNTERROTATING ROLLS SPACED APART A DISTANCE BETWEEN 0.005 INCH AND 0.020 INCH, THE PERIPHERAL SPEED OF ONE ROLL BEING MORE THAN DOUBLE THE PERIPHERAL SPEED OF THE OTHER ROLL, SIMULTANEOUSLY SCRAPING SAID MIXTURE FROM SAID ROLLS AFTER SAID MIXTURE HAS PASSED BETWEEN THE PERIPHERAL SURFACES OF SAID ROLLS, THEREBY FORMING FLAKED AGGREGATES, HEATING SAID AGGREGATES TO REDUCE THEIR MOSITURE CONTENT TO A LEVEL AT WHICH THEY CAN BE CRUSHED, AND CRUSHING AND SIZING THE HEATED AGGREGATES TO PRODUCE ATTAPULGITE CLAY AGGREGATES OF THE DESIRED MESH SIZE.
Claim 2
Independent Claim
123 words
A METHOD FOR MAKING HARD LIGHTWEIGHT CLAY SORBENT AGGREGATES WHICH COMPRISES: FORMING A MOIST PLASTIC MIXTURE COMPRISING COLLOIDAL ATTAPULGITE CLAY AND WATER, WITHOUT HEATING, CONTINUOUSLY FEEDING SAID MIXTURE BETWEEN THE PERIPHERAL SURFACES OF HARD AND SMOOTH SURFACED COUNTERROTATING ROLLS SPACED APART A DISTANCE BETWEEN 0.005 INCH AND 0.020 INCH, THE PERIPHERAL SPEED OF ONE ROLL BEING MORE THAN DOUBLE THE PERIPHERAL SPEED OF THE OTHER ROLL, SIMULTANEOUSLY SCRAPING SAID MIXTURE FROM SAID ROLLS AFTER SAID MIXTURE HAS PASSED BETWEEN THE PERIPHERAL SURFACES OF SAID ROLLS, THEREBY FORMING FLAKED AGGREGATES, HEATING SAID AGGREGATES TO REDUCE THEIR MOSITURE CONTENT TO A LEVEL AT WHICH THEY CAN BE CRUSHED, AND CRUSHING AND SIZING THE HEATED AGGREGATES TO PRODUCE ATTAPULGITE CLAY AGGREGATES OF THE DESIRED MESH SIZE.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |