US2591309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographically sensitive diazotype element
Assignee: GAF Chemicals Corp
•
Filing: 1945-11-10
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Granted: 1952-04-01
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Expires: 1965-11-10
Abstract
No abstract record available.
Inventors
- 👤 Slifkin Sam Charles
- 👤 Beese William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A WHITE OPAQUE LIGHT-SENSITIVE DIAZOTYPE REPRODUCTION MEDIUM CONSISTING OF A WATER-IMPERMEABLE, HIGHLY REFLECTIVE CELLULOSE ACETATE BASE OF UNIFORM COMPOSITION THROUGHOUT ITS CROSS-SECTION, AND HAVING UNIFORMLY DISPERSED THEREIN A FINELY GROUND OPACIFYING PIGMENT SELECTED FROM THE GROUP CONSISTING OF TITANIUM DIOXIDE AND BARIUM SULFATE, WHICH BASE IS IMPREGNATED IN ITS SURFACE PORTIONS ONLY WITH A LIGHT-SENSITIVE DIAZO COMPOUND DERIVED FROM A P-DIAMINE OF THE BENZENE SERIES AND AN AZO COUPLING COMPONENT.
Claim 2
Dependent Claim
70 words
A WHITE OPAQUE LIGHT-SENSITIVE DIAZOTYPE REPRODUCTION MEDIUM CONSISTING OF A WATER-IMPERMEABLE, HIGHLY REFLECTIVE CELLULOSE ACETATE BASE OF UNIFORM COMPOSITION THROUGHOUT ITS CROSS-SECTION, AND HAVING UNIFORMLY DISPERSED THEREIN A FINELY GROUND OPACIFYING PIGMENT SELECTED FROM THE GROUP CONSISTING OF TITANIUM DIOXIDE AND BARIUM SULFATE, WHICH BASE IS IMPREGNATED IN ITS SURFACE PORTIONS ONLY WITH A LIGHT-SENSITIVE DIAZO COMPOUND DERIVED FROM A P-DIAMINE OF THE BENZENE SERIES AND AN AZO COUPLING COMPONENT.
References Cited (Backward Citations)
US1570076A
Cited
US1756400A
Cited
US1758676A
Cited
GB318511A
Cited
GB337868A
Cited
US1966412A
Cited
FR833508A
Cited
GB509316A
Cited
GB536714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |