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US2531427A
Expired / Lapsed
US
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Modified gel-forming clay and process of producing same
Assignee: Individual
•
Filing: 1946-05-03
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Granted: 1950-11-28
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Expires: 1966-05-03
Abstract
No abstract record available.
Inventors
- 👤 Ernst A Hauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:01
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A CATION-MODIFIED CLAY, ORIGINALLY EXHIBITING A BASE-EXCHANGE CAPACITY OF AT LEAST 25, IN WHICH THE EXCHANGEABLE INORGANIC CATION HAS BEEN EXCHANGED FOR AN ONIUM BASE OF A CLASS CONSISTING OF AMMONIUM, PHOSPHONIUM, OXONIUM, SULFONIUM, ARSONIUM, STIBONIUM AND TELLURONIUM BASES AND WITH A HYDROPHOBIC RADICAL HAVING A MOLECULAR AREA OF AT LEAST 70 SQUARE ANGSTROM UNITS, SAID ONIUM BASE BEING OF A TYPE CAPABLE OF AND REPLACING THE INORGANIC CATION TO AN EXTENT SUFFICIENT FOR FORM WITH THE CLAY ANION AN ONIUM-CLAY SWELLING TO AT LEAST 10-FOLD IN NITROBENZENE.
Claim 2
Dependent Claim
88 words
A CATION-MODIFIED CLAY, ORIGINALLY EXHIBITING A BASE-EXCHANGE CAPACITY OF AT LEAST 25, IN WHICH THE EXCHANGEABLE INORGANIC CATION HAS BEEN EXCHANGED FOR AN ONIUM BASE OF A CLASS CONSISTING OF AMMONIUM, PHOSPHONIUM, OXONIUM, SULFONIUM, ARSONIUM, STIBONIUM AND TELLURONIUM BASES AND WITH A HYDROPHOBIC RADICAL HAVING A MOLECULAR AREA OF AT LEAST 70 SQUARE ANGSTROM UNITS, SAID ONIUM BASE BEING OF A TYPE CAPABLE OF AND REPLACING THE INORGANIC CATION TO AN EXTENT SUFFICIENT FOR FORM WITH THE CLAY ANION AN ONIUM-CLAY SWELLING TO AT LEAST 10-FOLD IN NITROBENZENE.
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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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |