US2799594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine pigments
Assignee: EIDP Inc
•
Filing: 1953-11-12
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Granted: 1957-07-16
•
Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Ehrich Felix Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:46
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PHTHALOCYANINE PIGMENT HIGHLY RESISTANT TO FLOCCULATION IN AN ORGANIC COATING VEHICLE COMPRISING A COSYNTHESIZED MIXTURE OF 90 TO 95 MOL PERCENT OF COPPER PHTHALOCYANINE PIGMENT SUBJECT TO SAID FLOCCULATION AND 5 TO 10 MOL PERCENT OF COPPER PHTHALOCYANINE 4-MONO SULFONIC ACID OBTAINED BY MIXING 1.25 TO 2.5 MOL PERCENT OF A SUBSTANCE FROM THE GROUP CONSISTING OF 4-SULFOPHTHALIC ACID AND 4-SULFO-PHTHALIC ANHYDRIDE WITH 98.75 TO 97.5 MOL PERCENT OF PHTHALIC ANHYDRIDE AND REACTING SAID MIXTURE AT ELEVATED TEMPERATURES WITH UREA AND CUPRIC CHLORIDE UNTIL REACTION IS COMPLETE.
Claim 2
Dependent Claim
88 words
A PHTHALOCYANINE PIGMENT HIGHLY RESISTANT TO FLOCCULATION IN AN ORGANIC COATING VEHICLE COMPRISING A COSYNTHESIZED MIXTURE OF 90 TO 95 MOL PERCENT OF COPPER PHTHALOCYANINE PIGMENT SUBJECT TO SAID FLOCCULATION AND 5 TO 10 MOL PERCENT OF COPPER PHTHALOCYANINE 4-MONO SULFONIC ACID OBTAINED BY MIXING 1.25 TO 2.5 MOL PERCENT OF A SUBSTANCE FROM THE GROUP CONSISTING OF 4-SULFOPHTHALIC ACID AND 4-SULFO-PHTHALIC ANHYDRIDE WITH 98.75 TO 97.5 MOL PERCENT OF PHTHALIC ANHYDRIDE AND REACTING SAID MIXTURE AT ELEVATED TEMPERATURES WITH UREA AND CUPRIC CHLORIDE UNTIL REACTION IS COMPLETE.
References Cited (Backward Citations)
US2285359A
Cited
US2526345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |