Patent US3275637A successfully refreshed from Google Patents.
US3275637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified quinacridones
Assignee: EIDP Inc
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Filing: 1965-11-18
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Granted: 1966-09-27
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Expires: 1985-11-18
Abstract
No abstract record available.
Inventors
- 👤 William A West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:10
CPC Classifications
C; C09; C09B; C09B48/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A QUINACRIDONE COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
A QUINACRIDONE COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
103 words
A PIGMENT COMPOSITION OF IMPROVED TINCTORIAL AND RHEOLOGICAL PROPERTIES CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF A QUINACRIDONE PIGMENT AND ABOUT 0.5% TO 25% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE PIGMENT COMPOSITION OF AT LEAST ONE OF THE QUINACRIDONE COMPOUNDS HAVING THE FORMULA: ((2-(HOOC-),X-PHENYL)-CO-NH-CH2-)M,R1,R2-5,7,12,14TETRAHYDROQUINO(2,3 -B)ACRIDIN-7,14-DIONE WHEREIN THE ORTHO-CARBOXYBENZAMIDOMETHYL GROUPS ARE SUBSTITUTED FOR AROMATIC HYDROGEN ON THE TERMINAL RINGS M IS AN INTEGER FROM 1 TO 4 INCLUSIVE, X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORINE, CHLORINE, BROMINE, METHYL AND METHOXY, AND R1 AND R2 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORINE, CHLORINE, BROMINE, METHYL AND METHOXY.
Claim 4
Dependent Claim
103 words
A PIGMENT COMPOSITION OF IMPROVED TINCTORIAL AND RHEOLOGICAL PROPERTIES CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF A QUINACRIDONE PIGMENT AND ABOUT 0.5% TO 25% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE PIGMENT COMPOSITION OF AT LEAST ONE OF THE QUINACRIDONE COMPOUNDS HAVING THE FORMULA: ((2-(HOOC-),X-PHENYL)-CO-NH-CH2-)M,R1,R2-5,7,12,14TETRAHYDROQUINO(2,3 -B)ACRIDIN-7,14-DIONE WHEREIN THE ORTHO-CARBOXYBENZAMIDOMETHYL GROUPS ARE SUBSTITUTED FOR AROMATIC HYDROGEN ON THE TERMINAL RINGS M IS AN INTEGER FROM 1 TO 4 INCLUSIVE, X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORINE, CHLORINE, BROMINE, METHYL AND METHOXY, AND R1 AND R2 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, FLUORINE, CHLORINE, BROMINE, METHYL AND METHOXY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |