US2496240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotypes stabilized with sulfo amino benzoic acids
Assignee: GAF Chemicals Corp
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Filing: 1947-06-06
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Granted: 1950-01-31
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Expires: 1967-06-06
Abstract
No abstract record available.
Inventors
- 👤 Glahn William H Von
- 👤 Lester N Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:04
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/66; C07F9/70; C07F9/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
PHOTOPRINTING MATERIALS COMPRISING LIGHT SENSITIVE LAYERS ON A SUITABLE BASE CONTAINING IN THE LIGHT SENSITIVE LAYER A DIAZO COMPOUND SUITABLE FOR FORMING A STABLE TWO-COMPONENT DIAZOTYPE LAYER, AN AZO DYE COUPLING COMPONENT AND A MEMBER OF THE CLASS CONSISTING OF SULFO AMINO BENZOIC ACIDS AND THEIR N-SUBSTITUTED DERIVATIVES WHEREIN THE SUBSTITUENT GROUP IS A MEMBER OF THE CLASS CONSISTING OF HYDROCARBON AND SUBSTITUTED HYDROCARBON GROUPS.
Claim 2
Dependent Claim
65 words
PHOTOPRINTING MATERIALS COMPRISING LIGHT SENSITIVE LAYERS ON A SUITABLE BASE CONTAINING IN THE LIGHT SENSITIVE LAYER A DIAZO COMPOUND SUITABLE FOR FORMING A STABLE TWO-COMPONENT DIAZOTYPE LAYER, AN AZO DYE COUPLING COMPONENT AND A MEMBER OF THE CLASS CONSISTING OF SULFO AMINO BENZOIC ACIDS AND THEIR N-SUBSTITUTED DERIVATIVES WHEREIN THE SUBSTITUENT GROUP IS A MEMBER OF THE CLASS CONSISTING OF HYDROCARBON AND SUBSTITUTED HYDROCARBON GROUPS.
References Cited (Backward Citations)
GB293347A
Cited
US2246425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |