Patent US3466045A successfully refreshed from Google Patents.
Patent US2537098A successfully refreshed from Google Patents.
US2537098A
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Sulfonamide azo coupling components used in diazo types
Assignee: GAF Chemicals Corp
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Filing: 1946-04-12
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Granted: 1951-01-09
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Slifkin Sam Charles
- 👤 Thaddeus J Trojnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
LIGHT-SENSITIVE DIAZOTYPE MATERIALS COMPRISING A LIGHT-SENSITIVE DIAZO COMPOUND AND AS AZO DYE COUPLING COMPONENTS SULFONAMIDES SELECTED FROM THE CLASS CONSISTING OF 4-(ACETOACETAMIDO)-BENZENSULFONAMIDE, 3-(3''-METHYLPYRAZOLONE-5)-BENZENESULFONAMIDE, 6.7-DIHYDROXY NAPHTALENE-2-(N-B-HYDROXYETHYL SULFONAMIDE), 4-(ACETAMIDO)-N-ETHYL BENZENESULFONAMIDE, AND 3-(3''-METHYL-PYRAZOLONE-5)-N-HYDROXYPROPYL BENZENESULFONAMIDE.
Claim 2
Dependent Claim
31 words
LIGHT-SENSITIVE DIAZOTYPE MATERIALS COMPRISING A LIGHT-SENSITIVE DIAZO COMPOUND AND AS AZO DYE COUPLING COMPONENTS SULFONAMIDES SELECTED FROM THE CLASS CONSISTING OF 4-(ACETOACETAMIDO)-BENZENSULFONAMIDE, 3-(3''-METHYLPYRAZOLONE-5)-BENZENESULFONAMIDE, 6.7-DIHYDROXY NAPHTALENE-2-(N-B-HYDROXYETHYL SULFONAMIDE), 4-(ACETAMIDO)-N-ETHYL BENZENESULFONAMIDE, AND 3-(3''-METHYL-PYRAZOLONE-5)-N-HYDROXYPROPYL BENZENESULFONAMIDE.
References Cited (Backward Citations)
GB331459A
Cited
US1857920A
Cited
US2353205A
Cited
US2364675A
Cited
US2298444A
Cited
US2342620A
Cited
US2432549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |