US3634089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-forming polyester compositions
Assignee: Eastman Kodak Co
•
Filing: 1969-04-04
•
Granted: 1972-01-11
•
Expires: 1989-04-04
Abstract
Abstract A photographic element comprising a film support consisting of a polyester of a 1,1,3-trialkyl-5-carboxy-3-(p-carboxyphenyl) bisphenols, with specific bisphenols, said polyester having an average molecular weight of at least 30,000.
Inventors
- 👤 Fredrick Lynn Hamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/181; C08G63/185; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/685; C08G63/6854; C08G63/6856; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
25 words
A photographic element according to claim 1 wherein the said layer of silver halide emulsion comprises silver halide grains having polyvalent metal ions occluded therein.
Claim 2
Dependent Claim
18 words
The photographic element according to claim 1 wherein the dicarboxylic acid portion of said polyester is a 1,1,1-trialkyl-5-carboxy-3-(p-carboxyphenyl)indan.
Claim 3
Dependent Claim
16 words
The photographic element according to claim 1 wherein the bisphenol portion of said polyester iS Bisphenol-A.
Claim 4
Dependent Claim
21 words
The photographic element according to claim 1 wherein said polyester material has a weight average molecular weight of at least 30,000.
Claim 5
Dependent Claim
21 words
The photographic element according to claim 1 wherein said polyester material has an intrinsic viscosity in tetrahydrofuran of 0.3 to 1.4.
Claim 6
Dependent Claim
21 words
The photographic element according to claim 1 wherein said polyester material has an intrinsic viscosity in tetrahydrofuran of 0.6 to 0.8.
Claim 7
Dependent Claim
24 words
The photographic element according to claim 1 wherein the polyester material is a linear polyester consisting essentially of units as specified in claim 1.
Claim 8
Dependent Claim
14 words
The photographic element according to claim 8 wherein said polyester material is copoly(2,2-bis(p-oxyphenyl)-propane-1,1,3-trimehtyl-5-carbonyl-3-(phenyl-p -carbonyl)indan).
Claim 9
Dependent Claim
32 words
The photographic element according to claim 1 wherein the polyester material comprises units as specified in claim 1 in copolymerized relationship with units of a dissimilar aromatic dicarboxylic acid with a diol.
Claim 10
Dependent Claim
16 words
The photographic element according to claim 10 wherein said aromatic dicarboxylic acid is a terephthalate acid.
Claim 11
Dependent Claim
13 words
The photographic element according to claim 11 wherein said diol is a bisphenol.
Claim 12
Dependent Claim
15 words
The photographic element according to claim 10 wherein said polyester material is poly(2,2-bis-(p-oxyphenyl)-propane-1,1,3-trimethyl-5-carbonyl-3-(phenyl-p -carbonyl)indan: terephthaloyl).
Claim 13
Dependent Claim
22 words
The photographic element according to claim 1 wherein the said polyester material has a glass transition temperature of at least 200* C.
References Cited (Backward Citations)
US3178378A
Cited
US3317466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |