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  • 1.
    [发明专利]JP19700125293 _ 1970年12月26日
  • 2.
    [发明专利]FR19700024466 _ AIR REDUCTION 1970年07月01日
    1320794 Mixing in conduits AIRCO Inc 22 June 1970 [2 July 1969] 30190/70 Heading B1C [Also in Division C1] Liquids passing through a pipe are mixed by fixing mixer units 128, 130 in the pipe. The units may be disposed in spaced pairs, one clockwise, a...
  • [发明专利]USD3651942 _ MARTIN J. BERARDI 1970年06月22日
    A reactor filter assembly is provided for purifying water, or other liquids, in an effluent stream, and which is designed, for example, to have a multistate construction. A four-stage system will be described. The influent to the system is first treat...
  • [发明专利]USD3688905 _ SVENSKA INTERPUR AB. 1970年04月17日
    A water purifier comprises a helical screw of sheet material carrying biologically active microorganisms. The helix is fitted around a horizontal, rotating shaft, and the outer periphery of the helix is tightly fitted within a cylindrical casing. End ...
  • [发明专利]USD3662918 _ DAVID D. CRAWFORD JOHN W. ELVINGTON 1970年08月24日
    A septic tank, which may be converted into a grease trap. The tank is preferably made of plastic reinforced with fiber glass and it is further reinforced due to the construction. The tank is light weight, therefore easy to install, is durable and resi...
  • [发明专利]USD3723308 _ BRECK D,US 1970年11月16日
    Ammonium ions are selectively removed from aqueous solutions containing alkali and/or alkaline earth cations by cation exchange with zeolite F. This is a synthetic crystalline aluminosilicate having a silica-to-alumina oxide mol ratio of about 2 which...
  • [发明专利]USD3639209 _ BUCKMAN LABORATORIES INC. 1970年04月07日
    Cationic starch complexes prepared by reacting an aqueous starch slurry with a water-soluble cationic polymeric polyelectrolyte are useful in treating cellulosic materials and as flocculating agents in aqueous systems.
  • [发明专利]USD3679053 _ POLLUTION CONTROL PRODUCTS INC. 1970年07月27日
    An aerobic batch sewage treatment system to receive raw sewage mixed with water and adapted to reduce the size of the sewage while simultaneously exposing it to oxygen to initiate aerobic activity. The system includes three tanks, an air lift pump wit...
  • [发明专利]USD3732160 _ RESEARCH CORP,US 1970年12月31日
  • [发明专利]USD3703453 _ STELLAR IND. LTD. 1970年09月01日
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