US2859219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon-soluble phthalocyanine dyes
Assignee: GAF Chemicals Corp
•
Filing: 1956-02-20
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Granted: 1958-11-04
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Tellis A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PREPARING A HYDROCARBON-SOLUBLE PHTALOCYANINE DYE COMPRISING THE STEPS OF SUSPENDING A COPPER TETRA CHLORO-METHYL PHTHALOCYANINE IN A MIXTURE CONSISTING ESSENTIALLY OF DICHLOROBENZENE AS INERT SOLVENT, STANNIC CHLORIDE AS CATALYST, AND DODECYLBENZENE, HEATING THE MIXTURE ABOVE 100* C. FOR 4 HOURS, COOLING THE MIXTURE, ADDING TO THE COOLED MIXTURE A NON-AQUEOUS NONSOLVENT FOR THE DYE, AND FILTERING OUT THE PRECIPITATED DYESTUFF.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PREPARING A HYDROCARBON-SOLUBLE PHTALOCYANINE DYE COMPRISING THE STEPS OF SUSPENDING A COPPER TETRA CHLORO-METHYL PHTHALOCYANINE IN A MIXTURE CONSISTING ESSENTIALLY OF DICHLOROBENZENE AS INERT SOLVENT, STANNIC CHLORIDE AS CATALYST, AND DODECYLBENZENE, HEATING THE MIXTURE ABOVE 100* C. FOR 4 HOURS, COOLING THE MIXTURE, ADDING TO THE COOLED MIXTURE A NON-AQUEOUS NONSOLVENT FOR THE DYE, AND FILTERING OUT THE PRECIPITATED DYESTUFF.
References Cited (Backward Citations)
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US2513098A
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US2604476A
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DE869105C
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US2795583A
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US2795584A
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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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |