Patent US2967158A successfully refreshed from Google Patents.
US2967158A
Expired / Lapsed
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Method for preparation of rounded clay-acid masses
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1958-06-10
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Granted: 1961-01-03
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Expires: 1978-06-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Malone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:56
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE METHOD FOR THE PREPARATION OF CONTACT MASSES FROM KAOLIN CLAY COMPRISING THE STEPS OF MIXING THE CLAY WITH FROM ABOUT 60 TO 125 PERCENT DOSAGE OF CONCENTRATED SULFURIC ACID, EXTRUDING THE MIXTURE TO FORM PELLETS OF PLASTIC CONSISTENCY, AGING THE PELLETS TO COMPLETE THE REACTION BETWEEN THE ACID AND THE ALUMINA OF SAID CLAY, THUS CONVERTING THE PELLETS TO A NONPLASTIC STATE, AND DESULFATING SAID AGED PELLETS BY CALCINING THEM AT AN ELEVATED TEMPERATURE, THE IMPROVEMENT COMPRISING DEFORMING SAID TO IMPART SUBSTANTIAL ROUNDNESS TO SAID PELLETS.
Claim 2
Dependent Claim
88 words
IN THE METHOD FOR THE PREPARATION OF CONTACT MASSES FROM KAOLIN CLAY COMPRISING THE STEPS OF MIXING THE CLAY WITH FROM ABOUT 60 TO 125 PERCENT DOSAGE OF CONCENTRATED SULFURIC ACID, EXTRUDING THE MIXTURE TO FORM PELLETS OF PLASTIC CONSISTENCY, AGING THE PELLETS TO COMPLETE THE REACTION BETWEEN THE ACID AND THE ALUMINA OF SAID CLAY, THUS CONVERTING THE PELLETS TO A NONPLASTIC STATE, AND DESULFATING SAID AGED PELLETS BY CALCINING THEM AT AN ELEVATED TEMPERATURE, THE IMPROVEMENT COMPRISING DEFORMING SAID TO IMPART SUBSTANTIAL ROUNDNESS TO SAID PELLETS.
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) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |