Patent US4058814A successfully refreshed from Google Patents.
Patent US3849191A successfully refreshed from Google Patents.
US3849191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic articles and materials useful in their manufacture
Assignee: Eastman Kodak Co
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Filing: 1969-10-02
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Granted: 1974-11-19
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Expires: 1989-10-02
Abstract
Abstract This development relates to film materials that are especially adapted for use as photographic film units in film packs which, in turn, are preferably adapted for development outside the camera. The photographic films for this invention are comprised of a black film base having on one surface thereof a layer containing spherical polymeric beads, carbon black and low viscosity cellulose nitrate (to provide improved adhesion to the film base). Optionally, on the other surface is a white layer containing titanium dioxide pigment and low viscosity cellulose nitrate, a gel sublayer, and finally a photographic emulsion. This application is directed to a light impermeable sheet coated on one surface with a low-friction, antistatic, antiblocking coating.
Inventors
- 👤 H Earhart
- 👤 F Jacoby
- 👤 C Starck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; G03C1/825; G03C8/00; G03C8/42; G03C8/52; Y; Y10; Y10S; Y10S430/00; Y10S430/148; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/24405; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
AN ARTICLE OF MANUFACTURE COMPRISED A LIGHT IMPREMEABLE SHEET AND UNIFORMYL COATED ON ONE SURFACE OF SAID LIGHT IMPERMABLE SHEET A LOW-FRICTION, ANTISTATIC, ANTIBLOCKING COATING WHICH CONSISTS ESSENTIALLY OF BY WEIGHT, A. FORMING ABOUT 30 TO ABOUT 55 PERCENT OF SUBSTANTIALLY SPHERICAL, POLYMERIC BEADS HAVING AN AVERAGE DIAMETER OF FROM ABOUT 0.5 TO ABOUT 25 MICRONS, SAID BEADS BEING SUBSTANTIALLY INSOLUBE IN A 30:70 BY WEIGHT MIXTURE OF ACETONE AND WATER; B. FROM ABOUT 10 TO 33 PERCENT OF LOW VISCOITY CELLULOSE NITRATE, SAID LOW VISCOSITY CELLULOSE NITRATE HAVING AN ABOUT 0.5 TO ABOUT 25 MICRONS, SAID BEADS BEING SUBSTANABOUT 1.5; AND C. FROM ABOUT 25 TO ABOUT 60 PERCENT OF FINELY DIVIDED CARBON BLACK.
Claim 2
Dependent Claim
115 words
AN ARTICLE OF MANUFACTURE COMPRISED A LIGHT IMPREMEABLE SHEET AND UNIFORMYL COATED ON ONE SURFACE OF SAID LIGHT IMPERMABLE SHEET A LOW-FRICTION, ANTISTATIC, ANTIBLOCKING COATING WHICH CONSISTS ESSENTIALLY OF BY WEIGHT, A. FORMING ABOUT 30 TO ABOUT 55 PERCENT OF SUBSTANTIALLY SPHERICAL, POLYMERIC BEADS HAVING AN AVERAGE DIAMETER OF FROM ABOUT 0.5 TO ABOUT 25 MICRONS, SAID BEADS BEING SUBSTANTIALLY INSOLUBE IN A 30:70 BY WEIGHT MIXTURE OF ACETONE AND WATER; B. FROM ABOUT 10 TO 33 PERCENT OF LOW VISCOITY CELLULOSE NITRATE, SAID LOW VISCOSITY CELLULOSE NITRATE HAVING AN ABOUT 0.5 TO ABOUT 25 MICRONS, SAID BEADS BEING SUBSTANABOUT 1.5; AND C. FROM ABOUT 25 TO ABOUT 60 PERCENT OF FINELY DIVIDED CARBON BLACK.
Claim 3
Dependent Claim
43 words
An article as in claim 1, wherein said polymeric beads are selected from the group consisting of homopolymers of methyl methacrylate, copolymers of methyl methacrylate with bifunctional monomers of member selected from divinyl benzene and diethylene glycol diallyl dicarbonate, polypropylene, and polyethylene beads.
Claim 4
Dependent Claim
13 words
An article as in claim 2, wherein said polymeric beads are polyethylene beads.
Claim 5
Dependent Claim
13 words
An article as in claim 2 wherein said polymeric beads are polypropylene beads.
Claim 6
Dependent Claim
132 words
An article of manufacture comprised of a light impermeable sheet and uniformly coated on one surface of said light impermeable sheet a low-friction, antistatic, antiblocking coating which consists essentially of by weight, a. from about 0.5 to about 10 parts of substantially spherical, polymeric beads having an average diameter of from about 0.5 to about 25 microns, said beads being substantially insoluble in a 30:70 by weight mixture of acetone and water; b. from about 0.3 to about 8 parts of low viscosity cellulose nitrate, said low viscosity cellulose nitrate having an intrinsic viscosity in acetone at 25*C of from about 0.4 to about 1.5; and c. from about 0.3 to about 8 parts of finely divided carbon black, said carbon black representing at least about 30 weight percent of said coating.
Claim 7
Dependent Claim
132 words
An article of manufacture comprised of a light impermeable sheet and uniformly coated on one surface of said light impermeable sheet a low-friction, antistatic, antiblocking coating which consists essentially of by weight, a. from about 0.5 to about 10 parts of substantially spherical, polymeric beads having an average diameter of from about 0.5 to about 25 microns, said beads being substantially insoluble in a 30:70 by weight mixture of acetone and water; b. from about 0.3 to about 8 parts of low viscosity cellulose nitrate, said low viscosity cellulose nitrate having an intrinsic viscosity in acetone at 25*C of from about 0.4 to about 1.5; and c. from about 0.3 to about 8 parts of finely divided carbon black, said carbon black representing at least about 30 weight percent of said coating.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |