US2914537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent soluble phthalocyanine dyes
Assignee: GAF Chemicals Corp
•
Filing: 1957-01-24
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Granted: 1959-11-24
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Wowk Anatole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:40
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; Y; Y10; Y10S; Y10S8/00; Y10S8/938
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
PROCESS FOR THE PREPARATION OF BLUE-GREEN TO BLUE DYEINGS OF SUPERIOR FASTNESS TO LIGHT AND CHLORINE, WHICH COMPRISES FORMING A LEUCO METAL PHTHALOCYAINE POUND BY REACTING 1 MOLE OF A METAL PHTHALOCYANINE WITH FROM 0.95 TO 1.10 MOLES OF AN ARYL SULFONDIHALOAMIDE, SELECTED FROM THE GROUP CONSISTING OF TOLUENE-P-SULFON DICHLOROAMIDE AND TOLUENE-P-SULFONDIBROMAMIDE, FOR FROM 4 TO 48 H OURS AT A TEMPERATURE OF FROM 20 TO 30*C. AND REGENERATING THE LEUCO COMPOUND BY SUBJECTING THE SAME TO AN ELEVATED TEMPERATURE OF FROM 80 TO 100*C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |