US3612650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection screen
Assignee: Fujifilm Holdings Corp
•
Filing: 1969-09-04
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Granted: 1971-10-12
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Expires: 1989-09-04
Abstract
Abstract A reflection-type projection screen comprising a support, the surface of which has a metallic luster, having coated thereon a light scattering layer comprising oil-containing microcapsules and a binder.
Inventors
- 👤 Shizuo Miyano
- 👤 Asaji Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B2227/00; G03B2227/32; G03B2227/325
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
19 words
The reflection-type projection screen as in claim 1 wherein the film forming polymer material of said microcapsules is gelatin.
Claim 2
Dependent Claim
45 words
The reflection-type projection screen as in claim 1 wherein said support is selected from the group consisting of an aluminum plate and aluminum foil which is obtained by compressively rolling two aluminum plates in facing relationship with one another and separating said two aluminum plates.
Claim 3
Dependent Claim
25 words
The reflection-type projection screen as in claim 1 wherein said core material is selected from the group consisting of tricresyl phosphate, silicon and dibutyl phthalate.
Claim 4
Dependent Claim
31 words
The reflection-type projection screen as in claim 1 wherein said binder is selected from the group consisting of gelatin, polystyrene, polyvinyl acetal, a cellulose derivative and a vinylidene chloride-vinyl chloride copolymer.
Claim 5
Dependent Claim
23 words
The reflection-type projection screen as in claim 1 wherein the core of said microcapsules varies in size from 1 micron to 100 microns.
Claim 6
Dependent Claim
36 words
The reflection-type projection screen as in claim 1, wherein the core material of said microcapsules is present in a ratio of from 0.1 to 10 parts, by weight, of the film forming material of said microcapsules.
Claim 7
Dependent Claim
22 words
The reflection-type projection screen as in claim 1 wherein the weight ratio of said microcapsules to said binder is about 1: 2.
Claim 8
Dependent Claim
26 words
The reflection-type projection screen as in claim 1 wherein said binder differs in refractive index from the core material of said microcapsules by at least 0.02.
Claim 9
Dependent Claim
13 words
A reflection-type projection screen as in claim 1 wherein said support comprises aluminum.
Claim 10
Dependent Claim
25 words
The reflection-type projection screen as in claim 1 wherein said core material is an inorganic material selected from a group consisting of glass and silica.
Claim 11
Dependent Claim
29 words
The reflection-type projection screen as in claim 1 wherein said core materiAl is a synthetic polymer resin selected from the group consisting of polystyrene, polyamide, polyester and vinyl resins.
Claim 12
Dependent Claim
27 words
The reflection-type projection screen as in claim 1 wherein said core material is a solution of a polymer dissolved in a solvent having a high boiling point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |