US3767410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic hydrophilic colloids and method of coating
Assignee: Eastman Kodak Co
•
Filing: 1972-02-22
•
Granted: 1973-10-23
•
Expires: 1992-02-22
Abstract
Abstract A composition is disclosed which comprises a solution of a hydrophilic colloid and a viscosity increasing concentration of a polysaccharide comprising a linear polymer in which either (1) at least one-third of the monosaccharide units are linked 1-2 and the remaining monosaccharide units are linked 1-4, or (2) substantially all monosaccharide units are linked 1-4 and at least 50 percent of the hydroxyl groups are acetylated or alkali metal sulfated.
Inventors
- 👤 D Brust
- 👤 G Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:51
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A photographic element comprising a support and integral layers, at least one layer comprising a photographic silver halide emulsion, wherein said integral layers contain a composition of matter comprising a solution of a hydrophilic colloid and a viscosity increasing concentration of a polysaccharide comPrising a linear polymer in which either (1) at least one-third of the monosaccharide units are linked 1-2 and the remaining monosaccharide units are linked 1-4, or (2) substantially all monosaccharide units are linked 1-4, and at least 50 percent of the hydroxyl groups are acetylated or alkali metal sulfated.
Claim 2
Dependent Claim
75 words
A photographic element comprising a support having thereon at least one layer comprising a silver halide emulsion and at least one layer, which can be the same as or different from said emulsion layer, comprising a hydrophilic colloid having therein, in a concentration of from about 0.001 to about 0.2 weight percent based on the colloid, of a bacterial polysaccharide that is either a B-1459 polysaccharide, a B-1973 polysaccharide or a polysaccharide of the structure
Claim 3
Dependent Claim
38 words
A silver halide emulsion comprising a photographic hydrophilic colloid solution comprising about 0.1 to about 6 weight percent colloid and a bacterial polysaccharide that is either a B-1459 polysaccharide, a B-1973 polysaccharide or a polysaccharide of the structure
References Cited (Backward Citations)
US3392019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |