US2900390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of copper phthalocyanine
Assignee: GAF Chemicals Corp
•
Filing: 1956-07-26
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Granted: 1959-08-18
•
Expires: 1976-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert E Brouillard
- 👤 Thomas R Tarantino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:40
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR PREPARING COPPER PHTHALOCYANINE BY REACTING TOGETHER AT A TEMPERATURE OF ABOUT 200*C. PHTHALIC ANHYDRIDE, A COPPER SALT AND UREA IN THE PRESENCE OF A CATALYST AND A SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING THE COPPER PHTHALOCYANINE BY THE STEPS OF REDUCING THE TEMPERATURE OF THE REACTION MASS BUT NOT BELOW 120*C., THEN FORMING A MIXTURE OF THE COOLED REACTION MASS WITH WATER AT A TEMPERATURE OF AT LEAST 50*C. BY PULVERIZING THE REACTION MASS AND WATER TOGETHER, THE VOLUME OF WATER USED IN SAID MIXTURE BEING GREATER THAN FOUR TIMES THE VOLUME OF THE REACTION MASS, AND AGITATING SAID MIXTURE.
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR PREPARING COPPER PHTHALOCYANINE BY REACTING TOGETHER AT A TEMPERATURE OF ABOUT 200*C. PHTHALIC ANHYDRIDE, A COPPER SALT AND UREA IN THE PRESENCE OF A CATALYST AND A SOLVENT, THE IMPROVEMENT WHICH COMPRISES RECOVERING THE COPPER PHTHALOCYANINE BY THE STEPS OF REDUCING THE TEMPERATURE OF THE REACTION MASS BUT NOT BELOW 120*C., THEN FORMING A MIXTURE OF THE COOLED REACTION MASS WITH WATER AT A TEMPERATURE OF AT LEAST 50*C. BY PULVERIZING THE REACTION MASS AND WATER TOGETHER, THE VOLUME OF WATER USED IN SAID MIXTURE BEING GREATER THAN FOUR TIMES THE VOLUME OF THE REACTION MASS, AND AGITATING SAID MIXTURE.
References Cited (Backward Citations)
DE658019C
Cited
US2213726A
Cited
AT156571B
Cited
US2382441A
Cited
US2723980A
Cited
US2668171A
Cited
GB745772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |