Patents
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Patents for 1981 (346)
05/1981
05/13/1981EP0028271A1 Dentifrice and its method of manufacture
05/12/1981US4267375 Preparation of thioethers
05/12/1981CA1101015A1 Detachable sunroof for automobiles
05/12/1981CA1100992A1 Bisulfite terminated oligomers as dispersing agents
05/12/1981CA1100844A1 Excess flow shutoff valve for hazardous fluids
05/12/1981CA1100826A1 Method of adding ingredients to a construction material
05/12/1981CA1100766A1 Rotary lawn mower with removable mulching attachment
05/12/1981CA1100726A1 Method of co-extrusion with foam core
05/05/1981CA1100556A2 Vehicle steering brake and clutch control
05/05/1981CA1100539A2 Container bottom cutting apparatus and method
05/05/1981CA1100345A2 Cartridge loader
04/1981
04/28/1981US4264776 From tertiary amines by oxidation in the presence of a carbon catalyst
04/28/1981US4264528 Method of preparing ketoxime carbamates
04/28/1981US4264527 Process for the preparation of cyclopropylmethyl-n-propylamine
04/28/1981CA1100243A1 Method and apparatus for water treatment
04/28/1981CA1100113A1 Portable searchlight
04/28/1981CA1099879A1 Process for producing acrylonitrile polymer film
04/28/1981CA1099865A2 Tire retreading system
04/21/1981US4263445 ω-Aryl-13,14-didehydro-PGA compounds
04/21/1981US4263226 Process for hydrolyzing 5-isothiocyano-5,6-dihydro-dicyclopentadiene
04/21/1981US4263221 Reacting phosgene with aromatic ureas
04/21/1981US4263220 Alkylene dicyanates
04/21/1981CA1099790A1 System for monitoring integrity of a patient return circuit
04/21/1981CA1099747A1 Process for the preparation of polyalkylbenzene hydroperoxides
04/21/1981CA1099606A2 Modular tubular solar energy collector apparatus
04/21/1981CA1099604A1 Heating and climate equalizing system
04/21/1981CA1099467A1 Method and apparatus for shaping of tubular film
04/14/1981US4261926 Reductive alkylation of substituted anilines
04/14/1981CA1099354A1 Grounding clip electric receptacles
04/14/1981CA1099315A2 Braking apparatus and method with booster and spoiler
04/14/1981CA1099280A1 Product of a chlorothioformate
04/14/1981CA1099128A1 Organic material treatment method and apparatus
04/14/1981CA1099102A2 Recording sheet and color developer therefor
04/14/1981CA1099063A1 Apparatus for the manufacturing of solid bodies made of a plastics material
04/07/1981USPP4683 Almond tree
04/07/1981US4260823 Bactericides, central nervous system stimulants
04/07/1981US4260562 Hydrogenation of a ketoxime, platinum, mineral acid
04/07/1981CA1098784A1 Apparatus for heating a liquid using solar energy
04/07/1981CA1098783A1 Solar energy collectors
04/01/1981EP0025934A1 Process for the production of p-substituted aromatic amines
03/1981
03/31/1981US4259525 Alkaline hydrolysis of 5-beta-methylmercaptoethyl-hydantoin
03/31/1981US4259260 Solvent process for hydrolyzing 5-isothiocyano-5,6-dihydrodicyclopentadiene
03/31/1981CA1098581A1 Thermal print bar
03/31/1981CA1098543A1 Preparation of n,n'-dialkylphenylenediamines
03/31/1981CA1098271A1 Blown film process
03/24/1981US4258211 Antidepressants
03/24/1981CA1098098A1 No translation available
03/24/1981CA1098044A1 Ear plug
03/24/1981CA1097874A2 Helically wound hose from co-extruded profile with reinforcing ribs interlocked at adjacent convolutions
03/17/1981USPP4674 Nectarine tree
03/17/1981USPP4673 Apricot tree
03/17/1981US4256670 Production of amino substituted aromatic compounds
03/17/1981US4256668 Removing aqueous ammonium sulfate from oxime product
03/17/1981US4256661 Removal of ammonia from hydrazinium thiocyanate solution then heating to effect isomerization
03/17/1981CA1097760A1 Secrecy system
03/17/1981CA1097725A1 Thermal printers
03/17/1981CA1097685A2 Method for production of unsymmetrical 1,3- disubstituted nitrosourea
03/17/1981CA1097682A1 Process for the production of phenylacetic acid derivatives
03/17/1981CA1097678A1 Phenoxyphenoxyalkanecarboxylic acid esters
03/17/1981CA1097677A2 Preparation of novel hydrazine derivatives
03/11/1981EP0024489A1 Process for the production of colourless aqueous solutions of chlorocholine chloride free from trimethyl amine and dichlorethane
03/10/1981US4255356 Separation from prim and sec amines, silica gel or alumina
03/10/1981CA1097374A2 1-alkylsulphinyl-1-alkylthio-2-nitroethylenes
03/10/1981CA1097168A1 Solar absorber plate design
03/10/1981CA1097123A1 Photographic material for use in the silver complex diffusion transfer process
03/10/1981CA1097116A2 Trigger device for automatic gun
03/10/1981CA1097012A1 Method of, and apparatus for, moulding plastics material products
03/10/1981CA1097003A1 Absorbent pad means
03/03/1981USPP4661 Peach tree
03/03/1981CA1096879A1 Deposit control additives
03/03/1981CA1096878A1 N,n'-disubstituted sulfonyl hydrazines
03/03/1981CA1096877A1 Preparation of organic sulfone compounds
03/03/1981CA1096778A2 Tone arm assembly
02/1981
02/24/1981US4252396 Connector with flat cable guides
02/24/1981CA1096422A1 Connecting apparatus for hingedly and slidably connecting an attachment to a self-propelled mine vehicle
02/24/1981CA1096401A1 Preparation of acrylamide
02/24/1981CA1096399A2 Iminodiacetic acid pharmaceutical
02/24/1981CA1096396A1 Process for preparing a new p-acetamidophenol derivative
02/24/1981CA1096241A1 Mass wave soldering system
02/24/1981CA1096219A2 Means for loading small firearms including a box magazine and cartridge clips
02/24/1981CA1096181A1 Crop conditioning roll and assembly thereof
02/24/1981CA1096119A1 Process for molding a polystyrene foam structure with a bonded covering
02/24/1981CA1096116A1 Apparatus for and method of producing corrugated thermoplastic tubing
02/24/1981CA1096115A1 Centering a tire in a mold
02/17/1981USPP4652 Peach tree
02/17/1981USPP4651 Almond tree
02/17/1981CA1096046A2 Signal coding for telephone communication system
02/17/1981CA1096045A2 Signal coding for telephone communication system
02/17/1981CA1095972A1 Inverter lockout circuit
02/17/1981CA1095793A1 Modular construction for solar heat collector
02/17/1981CA1095726A1 Tire correction system
02/17/1981CA1095682A1 Fire rated ceiling runner system with expansion accommodating means
02/17/1981CA1095676A1 Needle nozzle having valve
02/10/1981USPP4645 Grapefruit hybrid
02/10/1981USPP4644 Peach tree
02/10/1981US4250088 Demethylated lignin and process
02/10/1981CA1095511A1 Method of condensing and/or polymerising sulfonated lignin containing materials
02/10/1981CA1095393A2 Building arbor for tires and like articles having inextensible bead rings
02/10/1981CA1095392A2 Building arbor for tires and like articles having inextensible bead rings
02/10/1981CA1095391A2 Building arbor for tires and like articles having inextensible bead rings
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