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  • 11.
    [发明专利]FR19750037500 _ COMMISSARIAT A ENERGIE ATOMIQUE 1975年12月08日
  • [发明专利]DE19752529744 _ QUIGLEY CO.,INC. 1975年07月01日
  • [发明专利]DE19752540704 _ WIHR,ROLF 1975年09月12日
    Natural or synthetic rocks, stone or concrete, or structures made from these materials, are protected and conserved by spraying with a liq. which subsequently hardens. Suction is applied on >=1 side or cavity on the structure during spraying, opposite...
  • [发明专利]CH19750010037 _ SIKA FINANZ AG 1975年07月31日
    The sodium, potassium or calcium salt of hydroxyacetic acid, or glycolic acid, is employed as additive accelerating the setting time of Portland cement. The proportion of additive is of the order of 3 % by weight relative to the cement. The mixture of...
  • [发明专利]US19750632946 _ KUROSAKI REFRACTORIES CO., LTD. 1975年11月18日
    New compositions for refractory plugs to plug the tapholes of blast furnaces which exhibit less tendency to stiffen and to burn with the emission of heavy black smoke in use are prepared by adding 5-30 parts by weight of a petroleum pitch which has a ...
  • [发明专利]US19750638090 _ GEORGE KENT LIMITED 1975年12月05日
    A method of bonding a metal to a solid electrolyte, suitably for making an electrolytic cell for measuring the oxygen content of gases. A layer of the metal is first applied to a surface of the material and the material is then heated in an atmosphere...
  • [发明专利]US19750576208 _ STEETLEY LIMITED 1975年05月09日
    A process for making magnesia wherein a sludge of magnesium hydroxide is simultaneously dewatered and compacted to give a cake of magnesium hydroxide containing at least 67.5% by weight of solids and having a green bulk density of at least 1.15 grams/...
  • [发明专利]US19750604044 _ FUJIKURA KASEI CO., LTD. 1975年08月12日
    A method for vacuum deposition which comprises coating on the surface of a substrate to be metallized an undercoating composition comprising a hydroxyl-containing vinyl polymer havng a hydroxyl number of 20 to 200 and 1.1 to 5.0 equivalents, per equiv...
  • [发明专利]US19750600258 _ SOUTHWEST RESEARCH INSTITUTE 1975年07月30日
    A cement composition consisting of the product of a mixture of spray-dried hydrated silicate powder, a silica polymer-forming agent and water. The resulting inorganic silica polymer cement is capable of withstanding sustained exposure to high temperat...
  • [发明专利]US19750589294 _ SWISS ALUMINIUM LTD. 1975年06月23日
    Ceramic foams possessing controlled permeability and uniformity are prepared by the impregnation of an open-celled organic polymer foam material possessing a predetermined permeability and resilience with a aqueous slurry of a thixotropic ceramic comp...
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