Patents
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Patents for 1981 (346)
12/1981
12/30/1981EP0042510A1 Current switch driving circuit arrangements
12/29/1981CA1115351A1 Ground electrode pad for electro-surgical unit
12/29/1981CA1115335A1 Thermal head
12/29/1981CA1115155A1 Energy recovery from geothermal reservoirs containing brine
12/29/1981CA1115109A1 Cover sheet containing an alkali permeable hydrophilic layer between a barrier timing layer and an integral imaging receiver element
12/29/1981CA1115017A1 Cling film roll having a nodulose leading edge portion and the method and apparatus for producing it
12/23/1981EP0042096A1 Process for the preparation of N,N'-diacetylethylene diamine
12/22/1981CA1114891A1 Pulsed electrostatic precipitator
12/22/1981CA1114847A1 Paper folding and conveying apparatus
12/22/1981CA1114829A2 Acrylonitrile-capped polyethersiloxanes
12/15/1981CA1114505A1 Method of measuring blood clotting time
12/15/1981CA1114421A1 Safety chain arrangement for towed vehicles
12/15/1981CA1114400A2 Antiviral amine and amidine derivatives of glycerol and propanediols
12/15/1981CA1114273A2 Method of and means for making variable width zipper profile film
12/15/1981CA1114259A1 Parabolic reflector and method of forming the same
12/15/1981CA1114116A1 Plastic drum
12/09/1981EP0041172A1 Process for the preparation of pivaloylacetic-acid-2-chloro-5-(4-(2,4-di-tert.-amyl)-phenoxybutyramido) anilide
12/08/1981US4304935 Production of 1-phenyl-3-cyanoureas
12/08/1981CA1114005A2 Method of image formation
12/08/1981CA1113960A1 Catalyst for hydration of nitriles
12/08/1981CA1113754A1 Method of manufacture of molds for resin ophthalmic lenses having a segment with prismatic optical effect
12/01/1981CA1113602A1 Single track audio-digital recorder and circuit for use therein having error correction
12/01/1981CA1113591A1 Motor/brake transitioning for an inverter driven ac induction motor
12/01/1981CA1113492A1 2-amino-cyclopent-1-ene-1-thiocarboxylic acid-disulfides and a process for the preparation thereof
12/01/1981CA1113480A2 Benzylidenecamphors, production and cosmetic compositions thereof
12/01/1981CA1113366A1 Artificial board of lumber and method for manufacturing same
12/01/1981CA1113290A1 Mold for the casting of resin ophthalmic lenses having a prismatic segment
12/01/1981CA1113266A1 Leadless electric flash lamp
11/1981
11/24/1981USPP4793 Spur type Red Rome apple tree--Peach Valley cultivar
11/24/1981US4302599 In the para position
11/24/1981US4302199 Hair dyeing method
11/24/1981CA1113032A1 Process for reducing the acidity of organic polymeric isocyanates
11/24/1981CA1112955A1 Drive for watercraft comprising a surface propeller
11/24/1981CA1112882A2 Mowing machines
11/24/1981CA1112828A1 Process for the continuous casting of liquid polymerizable compositions
11/24/1981CA1112803A1 Internal fracture plate assembly with releasing feature
11/24/1981CA1112802A2 Diaper with elastic crotch restraint
11/17/1981USPP4792 Nectarine tree
11/17/1981USPP4791 Nectarine tree
11/17/1981USPP4790 Nectarine tree
11/17/1981CA1112738A1 Combustion monitor
11/17/1981CA1112461A2 Mowing rotor
11/17/1981CA1112437A1 Solar energy system
11/17/1981CA1112413A1 Fabrication of a flange adapter for plastic pipe
11/17/1981CA1112410A1 Method of molding hollow bodies
11/10/1981US4299978 Process for separating iminodiacetic acid from aqueous glycine solution
11/10/1981US4299969 Reacting alkyl cyclohexlidenes with benzyl mercaptan in the presence of an alkali metal mercaptide catalyst
11/10/1981CA1112331A1 Gas space monitor for enclosed liquid and gas containing inductive apparatus
11/10/1981CA1112251A1 Alkyl-n-(3-trifluoromethylphenyl)-anthranilate
11/10/1981CA1112120A2 Scalp anchor for hairpiece
11/10/1981CA1112118A1 Solar energy collection
11/10/1981CA1112012A1 Apparatus and method for producing a continuous flexible tubular conduit
11/10/1981CA1112009A2 Hub assembly
11/03/1981CA1111901A1 Gas discharge lamp employing a pulse generator with a double step amplification circuit
11/03/1981CA1111863A2 Fungicidal 1,2-dichlorocyanovinyl compounds
11/03/1981CA1111714A1 Personal flotation device
11/03/1981CA1111603A1 Device and method for inserting a bone screw
11/03/1981CA1111601A1 Acetabular prosthesis
10/1981
10/28/1981EP0038465A1 Process for the preparation of 2-trifluoromethyl aniline
10/28/1981EP0038367A1 Arrangement for operating acceleration and braking units
10/27/1981US4297513 Specifically 4-(2-hydroxyethyl-mercapto)benzophenone by reacting 4-chlorobenzophenone with 2-hydroxyethyl mercaptan
10/27/1981US4297098 Method for gradual coloring of hair to a light brown shade and preparations for use therein
10/27/1981CA1111324A1 Heat exchangers and solar heating
10/27/1981CA1111257A2 Flexible line trimmer with line feeding apparatus
10/27/1981CA1111219A1 Biaxial film process and rotary apparatus therefor
10/27/1981CA1111204A1 Therapeutic bed
10/20/1981CA1110937A1 Solar energy collector
10/13/1981CA1110754A2 Video traveling matte system
10/13/1981CA1110662A1 2-chloro-n-isopropyl-acetanilide derivatives
10/13/1981CA1110531A1 Method of continuously making a printing blanket construction
10/13/1981CA1110513A2 Evacuated solar collector
10/06/1981USPP4772 Muscadine grape
10/06/1981CA1110339A1 Plug-in connection to permit field assembly and disassembly of sf.sub.6 bus sections
10/06/1981CA1110271A2 Process for the manufacturing of optically active amino acids
10/06/1981CA1110132A2 Solar energy collection system
10/06/1981CA1110083A1 Anchor
10/06/1981CA1110007A2 Diaper with elastic waist means
09/1981
09/30/1981EP0036427A1 High temperature well packer
09/29/1981USPP4771 Muscadine grape
09/29/1981USPP4770 Muscadine grape
09/29/1981US4291532 Fuel supply system
09/29/1981CA1109969A1 Ram address enable circuit
09/29/1981CA1109937A1 Connector for coupling with another similar connector
09/29/1981CA1109839A1 Scarf hanger
09/29/1981CA1109697A1 Downshift inhibitor circuit
09/29/1981CA1109626A1 Process for compression rolling of polymeric films
09/29/1981CA1109624A1 Annular extrusion die
09/29/1981CA1109620A1 Expanded plastics mouldings
09/22/1981USPP4768 Strawberry plant
09/22/1981CA1109574A1 Three-dimensional display
09/22/1981CA1109453A2 Rock drill positioning mechanism
09/22/1981CA1109296A1 Hydraulic valve system
09/16/1981EP0035799A2 Process for obtaining phenyl alanine
09/15/1981CA1109155A1 Automatic d-c offset cancellation in pcm encoders
09/15/1981CA1108952A2 Solar concentrator and energy collection system
09/15/1981CA1108803A1 Molded syme foot and method of fitting and fabricating same
09/15/1981CA1108802A1 Prosthesis of artero-venous bridge for renal dialysis having caps with self sealing elastomer
09/08/1981US4288628 From benzene and dihalobenzene with hydrogen sulfide, absorptive catalyst
09/08/1981CA1108773A2 Plastic encapsulated semiconductor devices and method of making the same
09/08/1981CA1108583A2 Insulated roof
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