Patent US3661685A successfully refreshed from Google Patents.
US3661685A
Expired / Lapsed
US
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Laminated assembly of polycarbonate and polyacrylate resin sheets and method of making the same
Assignee: General Electric Co
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Filing: 1968-10-28
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Granted: 1972-05-09
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Expires: 1988-10-28
Abstract
Abstract Transparent globe for street lighting luminaires comprises a laminated assembly of superposed sheets of polycarbonate resin and polyacrylate resin having an ultraviolet absorbing compound incorporated preferably in the polyacrylate resin sheet.
Inventors
- 👤 Mitchell M Osteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:50
CPC Classifications
F; F21; F21V; F21V3/00; F21V3/04; B; B32; B32B; B32B27/00; B32B27/30; B32B27/36; F21S; F21S8/00; F21S8/08; F21W; F21W2131/00; F21W2131/10; F21W2131/103; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A material as defined in claim 1, wherein one of said sheets has incorporated therein an ultraviolet radiation absorbing compound.
Claim 2
Dependent Claim
20 words
A material as defined in claim 1, wherein said polyacrylate resin sheet has an ultraviolet radiation absorbing compound incorporated therein.
Claim 3
Dependent Claim
19 words
A material as defined in claim 3, and a light source which emits ultraviolet radiation arranged adjacent said material.
Claim 4
Dependent Claim
22 words
A device as defined in claim 4, wherein said laminated assembly is arranged with the polyacrylate resin sheet facing said light source.
Claim 5
Dependent Claim
33 words
A device as defined in claim 5, wherein said light source is mounted in a luminaire and said laminated assembly is in the form of a light transmitting globe covering said light source.
Claim 6
Dependent Claim
18 words
A device as defined in claim 1, wherein the polycarbonate resin sheet is sandwiched between polyacrylate resin sheets.
Claim 7
Dependent Claim
17 words
A device as defined in claim 7, wherein the polyacrylate resin sheets contain an ultraviolet absorbing compound.
Claim 8
Independent Claim
31 words
A method of making a laminated composite plastic sheet which comprises forming separate sheets of an aromatic polycarbonate resin and a polyacrylate resin, and joining said sheets together in superposed relation.
Claim 9
Dependent Claim
19 words
The method as defined in claim 9, wherein an ultraviolet absorbing compound is incorporated in the polyacrylate resin sheet.
Claim 10
Dependent Claim
19 words
The method as defined in claim 9, wherein said sheets are fused together by application of heat and pressure.
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |