US2699440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phthalocyanine pigments
Assignee: Wyeth Holdings LLC
•
Filing: 1952-01-08
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Granted: 1955-01-11
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 John W Eastes
- 👤 Theodore F Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:33
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF PRODUCING A FINELY-DIVIDED, TINCTORIALLY STRONG, NON-CRYSTALLIZING, RED SHADE, BETA FORM METAL PHTHALOCYANINE PIGMENT WHICH COMPRISES SUBJECTING A PHTHALOCYANINE PIGMENT PREPARED IN AN AUTOCLAVE IN THE PRESENCE OF A SATURATED ALICYCLIC HYDROCARBON SOLVENT AND THEREAFTER ACID-PASTED, TO TREATMENT WITH AN ALIPHATIC ISOCYANATE AT A TEMPERATURE OF ABOUT 90*C. TO ABOUT 140*C.
Claim 2
Independent Claim
53 words
THE METHOD OF PRODUCING A FINELY-DIVIDED, TINCTORIALLY STRONG, NON-CRYSTALLIZING, RED SHADE, BETA FORM METAL PHTHALOCYANINE PIGMENT WHICH COMPRISES SUBJECTING A PHTHALOCYANINE PIGMENT PREPARED IN AN AUTOCLAVE IN THE PRESENCE OF A SATURATED ALICYCLIC HYDROCARBON SOLVENT AND THEREAFTER ACID-PASTED, TO TREATMENT WITH AN ALIPHATIC ISOCYANATE AT A TEMPERATURE OF ABOUT 90*C. TO ABOUT 140*C.
References Cited (Backward Citations)
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US2615026A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |