Patent US2600377A successfully refreshed from Google Patents.
US2600377A
Expired / Lapsed
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Process for the preparation of sulfonated copper phthalocyanine dye
Assignee: Eastman Kodak Co
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Filing: 1948-08-06
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Granted: 1952-06-17
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Expires: 1968-08-06
Abstract
No abstract record available.
Inventors
- 👤 Chechak Jonas John
- 👤 Charles F H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:42
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE METHOD OF MAKING A SULFONATED COPPER PHTHALOCYANINE DYE, WHICH COMPRISES TREATING COPPER PHTHALOCYANINE FOR ABOUT TWO HOURS WITH AN EXCESS OF 15% OLEUM AT 170* TO 175* C. IN THE PRESENCE OF MERCURIC SULFATE CATALYST, COOLING AND DILUTING THE REACTION MIXTURE WITH WATER, BRINGING THE MIXTURE TO PH ABOUT 8,. REDUCING THE PH OF THE MIXTURE TO ABOUT 5 WITH ACETIC ACID, COOLING THE MIXTURE TO ABOUT 30* C., ADDING AN EXCESS OF TRIPHENYL GUANIDINE IN HOT AQUEOUS ALCOHOLIC ACETIC ACID SOLUTION TO FROM A GUANIDINE SALT OF THE DYE, REMOVING SAID GUANIDINE SALT AND DISSOLVING IT IN ETHYL ALCOHOL, THEN PRECIPITATING THE SODIUM SALT OF THE SULFONATED COPPER PHTHALOCYANINE FROM SOLUTION.
Claim 2
Independent Claim
113 words
THE METHOD OF MAKING A SULFONATED COPPER PHTHALOCYANINE DYE, WHICH COMPRISES TREATING COPPER PHTHALOCYANINE FOR ABOUT TWO HOURS WITH AN EXCESS OF 15% OLEUM AT 170* TO 175* C. IN THE PRESENCE OF MERCURIC SULFATE CATALYST, COOLING AND DILUTING THE REACTION MIXTURE WITH WATER, BRINGING THE MIXTURE TO PH ABOUT 8,. REDUCING THE PH OF THE MIXTURE TO ABOUT 5 WITH ACETIC ACID, COOLING THE MIXTURE TO ABOUT 30* C., ADDING AN EXCESS OF TRIPHENYL GUANIDINE IN HOT AQUEOUS ALCOHOLIC ACETIC ACID SOLUTION TO FROM A GUANIDINE SALT OF THE DYE, REMOVING SAID GUANIDINE SALT AND DISSOLVING IT IN ETHYL ALCOHOL, THEN PRECIPITATING THE SODIUM SALT OF THE SULFONATED COPPER PHTHALOCYANINE FROM SOLUTION.
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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |