Patent US3655263A successfully refreshed from Google Patents.
US3655263A
Expired / Lapsed
US
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Light diffusion device
Assignee: CLAUDE ALAN LINDQUIST JR
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Filing: 1970-04-20
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Granted: 1972-04-11
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Expires: 1990-04-20
Abstract
Abstract A light diffusion device comprising a transparent resin film having a coating adhered to one surface thereof and comprising the solid contents of a resin lacquer composition containing particulated alumina dispersed therein. A preferred embodiment comprises the use of a saturated polyester resin, both for said film and said lacquer.
Inventors
- 👤 Mark Hoffman
- 👤 Claude Alan Lindquist Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:45
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
The diffusion device of claim 1 wherein said film is about 0.001 to about 0.1 inch thick.
Claim 2
Dependent Claim
20 words
The diffusion device of claim 1 wherein said coating has applied thereto a protective coating of a clear, transparent resin.
Claim 3
Dependent Claim
18 words
The diffusion device of claim 1 wherein said percentage difference is from about 5 to about 10 percent.
Claim 4
Dependent Claim
15 words
The diffusion device of claim 1 wherein said resin film is a saturated polyester resin.
Claim 5
Dependent Claim
56 words
The diffusion device of claim 5 wherein said resin of said film is a polymerized linear ester of terephthalic acid and ethylene glycol and said polyester resin of said lacquer composition is a linear copolymer of a polymethylene glycol containing two to six carbon atoms, terephthalic acid, isophthalic acid and at least two acyclic dicarboxylic acids.
References Cited (Backward Citations)
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |