Patent US3963743A successfully refreshed from Google Patents.
US3963743A
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Method of conditioning phthalocyanine pigments and product thereof
Assignee: Chemetron Corp
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Filing: 1973-10-01
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Granted: 1976-06-15
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Expires: 1993-10-01
Abstract
Abstract A strong, clean phthalocyanine pigment is prepared by conditioning the crude pigment with 4-sulfophthalic acid or the anhydride thereof.
Inventors
- 👤 James Dial Stepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0019
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
A method of conditioning a phthalocyanine pigment selected from the class consisting of phthalocyanine, a metal phthalocyanine, a halogenated phthalocyanine and a halogenated metal phthalocyanine, said method consisting essentially of mixing the pigment with 4-sulfophthalic acid or anhydride at a temperature of from about 50° to about 100°C.
Claim 2
Independent Claim
48 words
A method of conditioning a phthalocyanine pigment selected from the class consisting of phthalocyanine, a metal phthalocyanine, a halogenated phthalocyanine and a halogenated metal phthalocyanine, said method consisting essentially of mixing the pigment with 4-sulfophthalic acid or anhydride at a temperature of from about 50° to about 100°C.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the phthalocyanine contains a halogen selected from the class consisting of fluorine, chlorine, and bromine and mixtures thereof.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the phthalocyanine pigment is a copper phthalocyanine.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the pigment is mixed with the anhydride.
Claim 6
Dependent Claim
22 words
The method of claim 4 wherein the weight ratio of the 4-sulfophthalic anhydride to pigment is from about 0.6:1 to about 6:1.
Claim 7
Dependent Claim
37 words
The method of claim 3 wherein the phthalocyanine contains a total of from about 0.5 to about 15 atoms of at least one halogen selected from the class consisting of chlorine and bromine per mole of phthalocyanine.
Claim 8
Dependent Claim
22 words
The method of claim 6 wherein the phthalocyanine contains from about 1 to about 8 atoms of bromine per mole of phthalocyanine.
Claim 9
Dependent Claim
22 words
The method of claim 6 wherein the phthalocyanine contains from about 1 to about 8 atoms of chlorine per mole of phthalocyanine.
Claim 10
Dependent Claim
20 words
The method of claim 8 wherein the phthalocyanine contains about 2 atoms of chlorine and about 8 atoms of bromine.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein the mixing temperature is from about 60° to about 90°C.
Claim 12
Dependent Claim
15 words
The method of claim 5 wherein the ratio is from about 1:1 to about 3:1.
Claim 13
Dependent Claim
12 words
The method of claim 1 wherein the mixing is accomplished by kneading.
References Cited (Backward Citations)
US2402167A
Cited
US2524672A
Cited
US2716649A
Cited
US2765318A
Cited
US2765319A
Cited
US2840568A
Cited
US2799595A
Cited
US2833782A
Cited
US2964531A
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US3080375A
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US3370065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |