US2742375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hydrophobic, organophilic pigments
Assignee: Wyeth Holdings LLC
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Filing: 1953-02-05
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Granted: 1956-04-17
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Expires: 1973-02-05
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Cooke
- 👤 John W Eastes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/08; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF PRODUCING A HYDROPHOBIC, ORGANOPHILIC PIGMENT WHICH COMPRISES SLURRYING THE PIGMENT PYA SOLUTION OF AT LEAST ONE HIGH MOLECULAR WEIGHT PYRIDINIUM CHLORIDE OF THE GROUP CONSISTING OF CETYLOXYMETHYL PYRIDINIUM CHLORIDE, STEARLYOXYMETHYL PYRIDINIUM STEARAMIDOMETHYL PYRIDINIUM CHLORIDE, DRYING THE PIGMENT, AND HEATING THE PIGMENT AT A TEMPERATURE OF ABOUT 100* C. TO 200* C. FOR AT LEAST 5 MINUTES TO DEVELOP THE HYDROPHOBIC, ORGANOPHILIKC PROPERTIES OF THE PYRIDINIUM CHLORIDE.
Claim 2
Independent Claim
69 words
THE METHOD OF PRODUCING A HYDROPHOBIC, ORGANOPHILIC PIGMENT WHICH COMPRISES SLURRYING THE PIGMENT PYA SOLUTION OF AT LEAST ONE HIGH MOLECULAR WEIGHT PYRIDINIUM CHLORIDE OF THE GROUP CONSISTING OF CETYLOXYMETHYL PYRIDINIUM CHLORIDE, STEARLYOXYMETHYL PYRIDINIUM STEARAMIDOMETHYL PYRIDINIUM CHLORIDE, DRYING THE PIGMENT, AND HEATING THE PIGMENT AT A TEMPERATURE OF ABOUT 100* C. TO 200* C. FOR AT LEAST 5 MINUTES TO DEVELOP THE HYDROPHOBIC, ORGANOPHILIKC PROPERTIES OF THE PYRIDINIUM CHLORIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |