US3824077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
So2sh dyes in dry heat dyeing
Assignee: Pechiney SA
•
Filing: 1970-07-27
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Granted: 1974-07-16
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Expires: 1990-07-27
Abstract
Abstract 1 WATER-SOLUBLE THIOXULPHONIC PHTHALOCYANINE DYESTUFFS, THESE DYSESTUFFS ARE USEFUL IN DYEING CELLULOSIC FIBERS AND ARE PREPARED BY REACTING A COPPER PHTHALOCYANINE SULPHOCHLORIDE IN AQUEOUS MEDIUM AT A TEMPERATURE BETWEEN 0*C. AND 100*C. WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SULPHIDES. ALKALI METAL HYDROSULPHIDES AND THIOUREA.
Inventors
- 👤 D Razavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:14
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B69/00
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |