US3345284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonaceous ion exchange materials
Assignee: Ashland LLC
•
Filing: 1964-10-12
•
Granted: 1967-10-03
•
Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 Ogden James Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:11
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A METHOD FOR PRODUCING CARBONACEOUS ION EXCHANGE MATERIALS, COMPRISING: FUSING AND CRUSHING ASPHALTENES, OBTAINED BY THE SOLVENT PRECIPITATION OF OXIDIZED ASPHALT TO OBTAIN GRANULAR ASPHALTENES HAVING A SIZE OF ABOUT 20 TO 80 MESH; ADDING ABOUT 1-10 PARTS OF 20% OLEUM TO EACH PART OF GRANULAR ASPHALTENES WHILE STIRRING AND CRUSHING LARGE PARTICLES; MAINTAINING THE TEMPERATURE AT LEAST EQUAL TO ABOUT 180*F. BUT NOT MORE THAN ABOUT 280* F.; WHEN GELATION AND AN APPARENT DRY POINT IS REACHED, CRUSHING TO A SIZE LESS THAN ABOUT 10 MESH BUT GREATER THAN ABOUT 80 MESH; HEATING THE CRUSHED PARTICLES TO A TEMPERATURE OF ABOUT 280*F.-350*F. WHILE STIRRING; QUENCHING THE HOT PARTICLES IN COLD WATER; REMOVING EXCESS LIQUID FROM THE MIXTURE AND WASHING WITH ADDIDITONAL COLD WATER TO REMOVE UNREACTED STRONG ACIDS; SCREENING SAID PARTICLES THROUGH ABOUT A 12 MESH SCREEN; WASHING THE PARTICLES PASSING THROUGH SAID SCREEN WITH BOILING WATER UNTIL THE EFFLUENT WATER IS COLORLESS; AND DRYING SAID PARTICLES AT A TEMPERATURE OF ABOUT 170*F. TO 190*F. UNTIL SAID PARTICLES HAVE A MOISTURE CONTENT OF ABOUT 20-80%.
Claim 2
Independent Claim
176 words
A METHOD FOR PRODUCING CARBONACEOUS ION EXCHANGE MATERIALS, COMPRISING: FUSING AND CRUSHING ASPHALTENES, OBTAINED BY THE SOLVENT PRECIPITATION OF OXIDIZED ASPHALT TO OBTAIN GRANULAR ASPHALTENES HAVING A SIZE OF ABOUT 20 TO 80 MESH; ADDING ABOUT 1-10 PARTS OF 20% OLEUM TO EACH PART OF GRANULAR ASPHALTENES WHILE STIRRING AND CRUSHING LARGE PARTICLES; MAINTAINING THE TEMPERATURE AT LEAST EQUAL TO ABOUT 180*F. BUT NOT MORE THAN ABOUT 280* F.; WHEN GELATION AND AN APPARENT DRY POINT IS REACHED, CRUSHING TO A SIZE LESS THAN ABOUT 10 MESH BUT GREATER THAN ABOUT 80 MESH; HEATING THE CRUSHED PARTICLES TO A TEMPERATURE OF ABOUT 280*F.-350*F. WHILE STIRRING; QUENCHING THE HOT PARTICLES IN COLD WATER; REMOVING EXCESS LIQUID FROM THE MIXTURE AND WASHING WITH ADDIDITONAL COLD WATER TO REMOVE UNREACTED STRONG ACIDS; SCREENING SAID PARTICLES THROUGH ABOUT A 12 MESH SCREEN; WASHING THE PARTICLES PASSING THROUGH SAID SCREEN WITH BOILING WATER UNTIL THE EFFLUENT WATER IS COLORLESS; AND DRYING SAID PARTICLES AT A TEMPERATURE OF ABOUT 170*F. TO 190*F. UNTIL SAID PARTICLES HAVE A MOISTURE CONTENT OF ABOUT 20-80%.
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |