Patent US3347632A successfully refreshed from Google Patents.
US3347632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hydrophilic carbon black
Assignee: Columbian Carbon Co
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Filing: 1963-08-23
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Granted: 1967-10-17
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Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Parker Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:07
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
METHOD FOR PRODUCING A CARBON BLACK HAVING OUTSTANDING HYDROPHILIC CHARACTERISTICS WHICH COMPRISES FORMING A REACTION MIXTURE OF A CARBON BLACK HAVING AN AVERAGE PARTICLE SIZE OF BELOW ABOUT 100 MU AND AN AQUEOUS SOLUTION OF SODIUM HYPOCHLORITE WHEREIN THE WEIGHT PROPORTION OF SODIUM HYPOCHLORITE TO CARBON BLACK IS AT LEAST 0.4 AND THE WEIGHT OF SODIUM HYPOCHLORITE PER SQUARE METER OF CARBON BLACK SURFACE MEASURED BY THE B.E.T. METHOD IS AT LEAST 2X10**-3 G./M.2, SUBJECTING THE REACTION MIXTURE TO AGITATION FOR A PERIOD OF TIME OF FROM ABOUT 5 MINUTES TO 2 1/2 HOURS TO EFFECT REACTION BETWEEN THE CARBON BLACK AND THE SODIUM HYPOCHLORITE, THE REACTION MIXTURE UPON COMPLETION OF THE REACTION HAVING A PH OF BELOW ABOUT 7, AND DRYING SAID CARBON BLACK TO A MOISTURE CONTENT BELOW ABOUT 2%.
Claim 2
Dependent Claim
132 words
METHOD FOR PRODUCING A CARBON BLACK HAVING OUTSTANDING HYDROPHILIC CHARACTERISTICS WHICH COMPRISES FORMING A REACTION MIXTURE OF A CARBON BLACK HAVING AN AVERAGE PARTICLE SIZE OF BELOW ABOUT 100 MU AND AN AQUEOUS SOLUTION OF SODIUM HYPOCHLORITE WHEREIN THE WEIGHT PROPORTION OF SODIUM HYPOCHLORITE TO CARBON BLACK IS AT LEAST 0.4 AND THE WEIGHT OF SODIUM HYPOCHLORITE PER SQUARE METER OF CARBON BLACK SURFACE MEASURED BY THE B.E.T. METHOD IS AT LEAST 2X10**-3 G./M.2, SUBJECTING THE REACTION MIXTURE TO AGITATION FOR A PERIOD OF TIME OF FROM ABOUT 5 MINUTES TO 2 1/2 HOURS TO EFFECT REACTION BETWEEN THE CARBON BLACK AND THE SODIUM HYPOCHLORITE, THE REACTION MIXTURE UPON COMPLETION OF THE REACTION HAVING A PH OF BELOW ABOUT 7, AND DRYING SAID CARBON BLACK TO A MOISTURE CONTENT BELOW ABOUT 2%.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |