US2720467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing photographic elements
Assignee: Ozalid Co Ltd
•
Filing: 1952-09-04
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Granted: 1955-10-11
•
Expires: 1972-09-04
Abstract
No abstract record available.
Inventors
- 👤 Franke Robert Herrmann
- 👤 Murray Humphrey Desmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR PREPARING PHOTOGRAPHIC ELEMENTS COMPRISING COATING A SUPPORT WITH A STABILISED AQUEOUS EMULSION COMPRISING A VINYL COMPOUND, PARTLY POLYMERISED TO A STAGE WHERE THE RESIN DROPLETS ARE STILL LIQUID AND SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE, VINYL ACETATE, VINYL ACETAL, STYRENE, ACRYLATES, METHACRYLATES AND COPOLYMERS THEREOF, A DIAZO TYPE SENSITIZING SOLUTION COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND, A COUPLING COMPONENT AND A FIXED ACID, DRYING THE EMULSION ON THE SUPPORT AND THEREAFTER HEATING THE COATED SUPPORT.
Claim 2
Dependent Claim
80 words
A PROCESS FOR PREPARING PHOTOGRAPHIC ELEMENTS COMPRISING COATING A SUPPORT WITH A STABILISED AQUEOUS EMULSION COMPRISING A VINYL COMPOUND, PARTLY POLYMERISED TO A STAGE WHERE THE RESIN DROPLETS ARE STILL LIQUID AND SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE, VINYL ACETATE, VINYL ACETAL, STYRENE, ACRYLATES, METHACRYLATES AND COPOLYMERS THEREOF, A DIAZO TYPE SENSITIZING SOLUTION COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND, A COUPLING COMPONENT AND A FIXED ACID, DRYING THE EMULSION ON THE SUPPORT AND THEREAFTER HEATING THE COATED SUPPORT.
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |