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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0800427 (1977-05-25) |
우선권정보 | JP-0067004 (1976-05-27); JP-0071575 (1976-06-04); JP-0077054 (1976-07-01); JP-0077055 (1976-07-01); JP-0079518 (1976-07-06); JP-0016117 (1977-02-18); JP-0016118 (1977-02-18) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 53 인용 특허 : 1 |
Thermoplastic multi-walled pipe which has at least two tubular members different in inside diameter and concentrically arranged, these tubular members being spaced and supported by a plurality of ribs so as to provide hollow portions therebetween. The bond strength between the inner end surface of t
A thermoplastic multi-walled pipe comprising at least two tubular members different in inside diameter and concentrically arranged with a hollow portion therebetween, and a plurality of ribs spacing said tubular members and being bonded to said tubular members, said pipe being characterized in that
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