Patent US2748057A successfully refreshed from Google Patents.
US2748057A
Expired / Lapsed
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Cation exchange materials and their preparation
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1953-03-16
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Granted: 1956-05-29
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A PROCESS OF PREPARING A CARBONACEOUS CATION EXCHANGE MATERIAL WHICH COMPRISES SULFONATING AN ASPHALTTYPE BITUMINOUS MATERIAL WITH CONCENTRATED SULFURIC ACID, FURTHER SULFONATING EACH PART BY WEIGHT OF THE RESULTANT PRODUCT WITH FROM 2 TO 10 PARTS BY WEIGHT OF OLEUM AND WASHING EXCESS ACID OUT OF THE RESULTANT PRODUCT.
Claim 2
Dependent Claim
49 words
A PROCESS OF PREPARING A CARBONACEOUS CATION EXCHANGE MATERIAL WHICH COMPRISES SULFONATING AN ASPHALTTYPE BITUMINOUS MATERIAL WITH CONCENTRATED SULFURIC ACID, FURTHER SULFONATING EACH PART BY WEIGHT OF THE RESULTANT PRODUCT WITH FROM 2 TO 10 PARTS BY WEIGHT OF OLEUM AND WASHING EXCESS ACID OUT OF THE RESULTANT PRODUCT.
Claim 3
Dependent Claim
41 words
A CARBONACEOUS CATION EXCHANGE MATERIAL COMPRISING EACH PART BY WEIGHT OF THE REACTION PRODUCT OF AN ASPHALT-TYPE BITUMINOUS MATERIAL WITH CONCENTRATED SULFURIC ACID FURTHER REACTED WITH FROM 2 TO 10 PARTS BY WEIGHT OF OLEUM AND WASHED FREE OF EXCESS ACID.
Claim 4
Dependent Claim
41 words
A CARBONACEOUS CATION EXCHANGE MATERIAL COMPRISING EACH PART BY WEIGHT OF THE REACTION PRODUCT OF AN ASPHALT-TYPE BITUMINOUS MATERIAL WITH CONCENTRATED SULFURIC ACID FURTHER REACTED WITH FROM 2 TO 10 PARTS BY WEIGHT OF OLEUM AND WASHED FREE OF EXCESS ACID.
References Cited (Backward Citations)
US1459328A
Cited
US1578235A
Cited
US1868211A
Cited
US2299469A
Cited
US2208171A
Cited
US2382334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |