US3660153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-intercepting composition for photographic light-sensitive film
Assignee: Fujifilm Holdings Corp
•
Filing: 1969-01-27
•
Granted: 1972-05-02
•
Expires: 1989-01-27
Abstract
Abstract Light-intercepting composition consisting of an ethylene-vinyl acetate copolymer having dispersed therein carbon black. In film form, the composition is laminated to a paper to provide a lightintercepting paper for use in photographic light-sensitive roll film.
Inventors
- 👤 Yoshihiro Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:31
CPC Classifications
G; G03; G03C; G03C3/00; G03C3/02; Y; Y10; Y10T; Y10T428/00; Y10T428/25
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
The light-intercepting paper as claimed in claim 1 wherein said carbon black of said light-intercepting composition has been dispersed in said copolymer with the aid of a dispersing agent selected from the group consisting of sorbitan monooleate, sorbitan sesquioleate, sorbitan monostearate, polyoxyethylene alkyl ether and polyoxyethylene alkylaryl ether.
Claim 2
Dependent Claim
26 words
The light-intercepting paper as claimed in claim 1 wherein the melt index value of the ethylene-vinyl acetate copolymer employed ranges from about 1.0 to about 150.
Claim 3
Dependent Claim
20 words
The light-intercepting paper as claimed in claim 1 wherein the particle size of the carbon black is below 50 millimicrons.
Claim 4
Dependent Claim
22 words
The light-intercepting paper as claimed in claim 1 wherein the pH of the carbon black ranges from about 4 to about 8.
Claim 5
Dependent Claim
23 words
The light-intercepting paper as claimed in claim 1 wherein said carbon black has been dispersed in said copolymer by means of a solvent.
Claim 6
Dependent Claim
13 words
The light-intercepting paper as claimed in claim 6 wherein said solvent is toluene.
References Cited (Backward Citations)
US2646366A
Cited
US2751309A
Cited
US2916395A
Cited
US2984582A
Cited
US3336150A
Cited
US3111422A
Cited
US3376154A
Cited
US3379560A
Cited
US3509088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |