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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0216193 (1988-07-07) |
우선권정보 | AU-0012941 (1987-07-06) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 9 인용 특허 : 2 |
An insulating board is formed of a low density insulating material, such as polystyrene foam. The board has perforations therein and deformations on its upper and its lower surfaces. A high density material, such as gypsum or artificial resin fills the perforations and deformations and extends over
An article comprising an insulating board having a plurality of perforations therein arranged in an array, said board being formed from a low density material and having an upper surface and a lower surface, at least one of said surfaces having surface deformations, said deformations including inden
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