发明授权
- 专利标题: Gypsum fiberboard door frame
- 专利标题(中): 石膏纤维板门框
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申请号: US932785申请日: 1992-08-20
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公开(公告)号: US5347780A公开(公告)日: 1994-09-20
- 发明人: Turner W. Richards , Hubert C. Francis , George F. Fowler, Jr.
- 申请人: Turner W. Richards , Hubert C. Francis , George F. Fowler, Jr.
- 申请人地址: GA Atlanta
- 专利权人: Georgia-Pacific Corporation
- 当前专利权人: Georgia-Pacific Corporation
- 当前专利权人地址: GA Atlanta
- 主分类号: C04B14/10
- IPC分类号: C04B14/10 ; B28B1/52 ; B28B5/02 ; B28B19/00 ; B32B13/04 ; C04B14/12 ; C04B14/20 ; C04B16/02 ; C04B24/24 ; C04B28/14 ; E04B1/94 ; E06B1/24 ; E06B1/26 ; E06B1/32 ; E06B1/34 ; E06B5/16 ; B06B1/08
摘要:
A door frame having excellent fire-resistance, flexural strength and screw holding properties is fabricated from gypsum fiberboard, specifically a gypsum fiberboard having a density of at least 60 lbs./cu.ft., a flexural strength of at least about 30 lbs. (1/2" thick material), and a screw holding capability of at least about 400 lbs. A preferred gypsum fiberboard material for fabrication of the door frame comprises a composition containing a substantially uniform dispersion of solids including by weight about 65% to 90% set gypsum, about 7% to about 30% pulped paper, up to about 9% binder, and about 0.8% to 2% inorganic fiber. A wood veneer is preferably applied to the visible faces of the gypsum fiberboard door frame members.
公开/授权文献
- US5836985A Method for treating abnormal arial or ventricular activity 公开/授权日:1998-11-17
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