Patent US4307184A successfully refreshed from Google Patents.
US4307184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements containing polymers having aminoallylidenemalononitrile units
Assignee: 3M Co
•
Filing: 1980-09-22
•
Granted: 1981-12-22
•
Expires: 2000-09-22
Abstract
Abstract The present invention refers to a photographic material including in one of its layers a polymeric product having an aminoallylidenemalononitrile ultraviolet absorber unit which can be introduced into a photographic layer by aqueous solutions, with the method according to this invention, of including said aminoallylidenemalononitrile unit in an allyl monomer and then copolymerizing it with an ethylenically unsaturated monomer in order to obtain said polymeric product to be added to the layer forming composition. This invention is of particular industrial interest in the field of color photographic materials.
Inventors
- 👤 Paolo Beretta
- 👤 Angelo Vallarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; C; C08; C08F; C08F26/00; C08F26/02; Y; Y10; Y10S; Y10S430/00; Y10S430/132
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
A photographic material comprising at least one silver halide emulsion layer and at least one auxiliary layer on a supporting base, characterized by having at least one of said layers containing a polymer having an ultraviolet radiation absorbing aminoallylidenemalononitrile group.
Claim 2
Dependent Claim
40 words
A photographic material comprising at least one silver halide emulsion layer and at least one auxiliary layer on a supporting base, characterized by having at least one of said layers containing a polymer having an ultraviolet radiation absorbing aminoallylidenemalononitrile group.
Claim 3
Dependent Claim
15 words
A photographic material according to claim (1), in which said auxiliary layer contains said polymer.
Claim 4
Dependent Claim
16 words
A photographic material according to claim (1), wherein said auxiliary layer is an external protective layer.
Claim 5
Dependent Claim
19 words
A photographic material according to claim (1), wherein said emulsion layer and said auxiliary layer are comprised of gelatin.
Claim 6
Dependent Claim
16 words
A photographic material according to claim (1), wherein said silver halide emulsion layer is optically sensitized.
Claim 7
Dependent Claim
17 words
A photographic material according to claim (1), wherein said silver halide emulsion layer has photographic couplers therein.
Claim 8
Dependent Claim
31 words
A photographic material according to claim (1), wherein said ultraviolet absorber aminoallylidenemalonoitrile group is included in a polymeric compound, which is the reaction product of 3-diallylaminoallylidenemalononitrile and an ethylenically unsaturated monomer.
Claim 9
Dependent Claim
30 words
A photographic material according to claim (1), wherein said ultraviolet absorber aminoallylidenemalononitrile group is included in a polymeric compound which is the reaction product of 3-diallylaminoallylidenemalononitrile and an acrylic monomer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |