US3589924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-crystallizing,non-flocculating phthalocyanines
Assignee: Wyeth Holdings LLC
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Filing: 1970-06-23
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Granted: 1971-06-29
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Expires: 1990-06-23
Abstract
Abstract A NON-FLOCCULATING, NON-CRYSTALLIZING PHTHALOCYANINE PIGMENT COMPOSITION IS FORMED BY A MIXTURE OF 60-95% OF A CRYSTALLIZATION, FLOCCULATION SUSCEPTIBLE PHTHALOCYANINE PIGMENT AND ABOUT 5-40% OF A SULFONATED PHTHALIMIDOMETHYL PHTHALOCYANINE DERIVATIVE REPRESENTED BY THE FORMULA: (PCY-(CH2-N<(-CO-R-CO-)Y)/(SO3H)X WHEREIN PCY IS A PHTHALOCYANINE RADICAL, R IS A PHENYLENE RADICAL, X IS 0.2 TO 2.5, Y IS 0.6 TO 2.1, AND X+Y IS NOT GREATER THAN 3.0.
Inventors
- 👤 Vito Albert Giambalvo
- 👤 William Lee Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:09
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12; C09B67/00; C09B67/0033; C09B67/0034; C09B67/0035
Claims Analysis
Total Claims: 0
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |