US2531485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotypes comprising amine salts of sulfonic acid containing azo components
Assignee: GAF Chemicals Corp
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Filing: 1947-04-02
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Granted: 1950-11-28
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Expires: 1967-04-02
Abstract
No abstract record available.
Inventors
- 👤 Glahn William H Von
- 👤 Lester N Stanley
- 👤 Albany Margaret A Hand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A DIAZOTYPE MATERIAL COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND SUITABLE FOR TWO COMPONENT DIAZOTYPES, A NON-COUPLING AMINE WHICH IS CAPABLE OF SALT FORMATION AND IS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND CYCLO-ALKYL AMINES AND AN AZO COUPLYING COMPONENT SELECTED FROM THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS HAVING AT LEAST ONE SULFONIC ACID GROUP BUT NO AMINO GROUPS.
Claim 2
Dependent Claim
60 words
A DIAZOTYPE MATERIAL COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND SUITABLE FOR TWO COMPONENT DIAZOTYPES, A NON-COUPLING AMINE WHICH IS CAPABLE OF SALT FORMATION AND IS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND CYCLO-ALKYL AMINES AND AN AZO COUPLYING COMPONENT SELECTED FROM THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS HAVING AT LEAST ONE SULFONIC ACID GROUP BUT NO AMINO GROUPS.
References Cited (Backward Citations)
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Cited
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Cited
US1989065A
Cited
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Cited
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Cited
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Cited
US2433632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |