US4347284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
White cover sheet material capable of reflecting ultraviolet rays
Assignee: Hiraoka and Co Ltd
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Filing: 1980-11-03
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Granted: 1982-08-31
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Expires: 2000-11-03
Abstract
Abstract A white cover sheet material capable of reflecting ultraviolet rays, comprises at least one outer surface layer thereof which comprises (A) a substantially colorless matrix material comprising a thermoplastic polymer material and (B) a white ultraviolet ray-reflecting agent comprising ZrO 2 , the cover sheet material being difficult to be distinguished from snow surface not only by naked eye, but also, by an ultraviolet ray inspecting device.
Inventors
- 👤 Obayashi Tsutomu
- 👤 Endou Mituo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:25
CPC Classifications
F; F41; F41H; F41H3/00; F41H3/02; Y; Y10; Y10S; Y10S428/00; Y10S428/919; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/31
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
44 words
A white cover sheet material capable of reflecting ultraviolet rays, which comprises: (A) a substantially colorless matrix material comprising at least one thermoplastic polymer material and, (B) a white ultraviolet ray-reflecting agent dispersed in said matrix material and comprising zirconium oxide (ZrO 2 ).
Claim 2
Dependent Claim
44 words
A white cover sheet material capable of reflecting ultraviolet rays, which comprises: (A) a substantially colorless matrix material comprising at least one thermoplastic polymer material and, (B) a white ultraviolet ray-reflecting agent dispersed in said matrix material and comprising zirconium oxide (ZrO 2 ).
Claim 3
Dependent Claim
40 words
A white cover sheet material as claimed in claim 1, wherein the amount of said white ultraviolet ray-reflecting agent is in a range of from 20 to 200% based on the weight of said matrix material in said sheet material.
Claim 4
Dependent Claim
40 words
A white cover sheet material as claimed in claim 1, wherein said thermoplastic polymer material is selected from the group consisting of natural rubbers, synthetic rubbers, polyvinyl chloride, polyethylene, polypropylene, ethylene-vinyl acetate copolymers, vinyl chloride-vinyl acetate copolymers and polyurethane resins.
Claim 5
Dependent Claim
30 words
A white cover sheet material as claimed in claim 1, wherein said white ultraviolet ray-reflecting agent is in the form of fine particles having an 100 mesh size or smaller.
Claim 6
Dependent Claim
20 words
A white cover sheet material as claimed in claim 1, which sheet material is in the form of a film.
Claim 7
Dependent Claim
21 words
A white cover sheet material as claimed in claim 1, which sheet material is in the form of a fiber fabric.
Claim 8
Dependent Claim
24 words
A white cover sheet material as claimed in claim 1, which sheet material further contains a white flame-retarding agent dispersed in said matrix material.
Claim 9
Dependent Claim
71 words
A white cover sheet material capable of reflecting ultraviolet rays, which comprises a substrate sheet layer and at least one outer surface layer formed on at least one surface of said substrate sheet layer, said outer surface layer comprising: (A) a substantially colorless matrix material comprising at least one thermoplastic polymer material and, (B) a white ultraviolet ray-reflecting agent dispersed in said matrix material and comprising zirconium oxide (ZrO 2 ).
Claim 10
Dependent Claim
71 words
A white cover sheet material capable of reflecting ultraviolet rays, which comprises a substrate sheet layer and at least one outer surface layer formed on at least one surface of said substrate sheet layer, said outer surface layer comprising: (A) a substantially colorless matrix material comprising at least one thermoplastic polymer material and, (B) a white ultraviolet ray-reflecting agent dispersed in said matrix material and comprising zirconium oxide (ZrO 2 ).
Claim 11
Dependent Claim
22 words
A white cover sheet material as claimed in claim 8, wherein said outer surface layer is in the form of a film.
Claim 12
Dependent Claim
23 words
A white cover sheet material as claimed in claim 8, wherein said outer surface layer is in the form of a fiber fabric.
Claim 13
Dependent Claim
27 words
A white cover sheet material as claimed in claim 8, wherein said substrate sheet layer comprises an electro-conductive substance effective for reflecting electromagnetic waves usable for radar.
Claim 14
Dependent Claim
19 words
A white cover sheet material as claimed in claim 8, wherein said substrate sheet layer contains a flame-retarding agent.
Claim 15
Dependent Claim
21 words
A white cover sheet material as claimed in claim 8, wherein said surface of said substrate sheet layer is substantially colorless.
Claim 16
Dependent Claim
34 words
A white cover sheet material as claimed in claim 13, wherein said substrate sheet layer comprises at least one substantially colorless surface layer formed on at least one surface of a supporting sheet material.
Claim 17
Dependent Claim
37 words
A white cover sheet material as claimed in claim 13, wherein said substantially colorless surface layer comprises a substantially colorless matrix material comprising at least one thermoplastic polymer material, and titanium dioxide dispersed in said matrix material.
Claim 18
Dependent Claim
19 words
A white cover sheet material as claimed in claim 13, wherein said substrate sheet layer is a fiber fabric.
Claim 19
Dependent Claim
31 words
A white cover sheet material as claimed in claim 16, wherein said fiber fabric exhibits a reflectivity of 60% or more for ultraviolet rays having a wave length of 360 millimicrons.
Claim 20
Dependent Claim
30 words
A white cover sheet material as claimed in claim 17, wherein said fiber fabric is comprised of polyvinyl alcohol fibers which have been modified to be water-insoluble or sparingly water-soluble.
Claim 21
Dependent Claim
33 words
A white cover sheet material as claimed in claim 8, wherein said outer surface layer contains, in addition to said white ultraviolet ray-reflecting agent, a white flame-retarding agent dispersed in said matrix material.
Claim 22
Dependent Claim
18 words
A white cover sheet material as claimed in claim 19, wherein said white flame-retarding agent is diantimony trioxide.
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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |