Patent US3252991A successfully refreshed from Google Patents.
US3252991A
Expired / Lapsed
US
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Conditioning of phthalocyanine pigments
Assignee: GAF Chemicals Corp
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Filing: 1962-05-02
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Granted: 1966-05-24
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Harold N Schmidt
- 👤 Melvin N Turetzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:11
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD WHICH COMPRISES FORMING A MIXTURE, IN INTIMATE CONTACT, OF A CRUDE PHTHALOCYANINE AND A STRONG, NON-OXIDIZING LIQUID ACID HAVING A CONCENTRATION OF AT LEAST 80 PERCENT IN AN AMOUNT SUFFICIENT TO PRODUCE A DOUGHY, KNEADABLE MASS FOR A PERIOD OF TIME SUFFICIENT TO INDUCE FORMATION OF THE ACID-PHTHALOCYANINE ADDITION COMPOUND WITHOUT ATTENDANT CRYSTAL GROWTH AND FORTHWITH DISCHARGING SAID MIXTURE INTO WATER.
Claim 2
Independent Claim
63 words
THE METHOD WHICH COMPRISES FORMING A MIXTURE, IN INTIMATE CONTACT, OF A CRUDE PHTHALOCYANINE AND A STRONG, NON-OXIDIZING LIQUID ACID HAVING A CONCENTRATION OF AT LEAST 80 PERCENT IN AN AMOUNT SUFFICIENT TO PRODUCE A DOUGHY, KNEADABLE MASS FOR A PERIOD OF TIME SUFFICIENT TO INDUCE FORMATION OF THE ACID-PHTHALOCYANINE ADDITION COMPOUND WITHOUT ATTENDANT CRYSTAL GROWTH AND FORTHWITH DISCHARGING SAID MIXTURE INTO WATER.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |