U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!

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Class 204/168 - Hydrocarbons


Subclass of Class 204 - Chemistry: electrical and wave energy
Definition: Processes directed to the production and treatment of hydrocarbons.
No. of patents: 140
Last issue date: 10/30/2007


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NumberTitleIssue Date
4183434Peelable seal
A bag for storing blood components consisting of a sterilizable, flexible polyolefin container having at least two inlets at the top thereof forming part of the container and a bag-like protective closure hermetically enclosing the inlets. The protective ...
01/15/1980
4173661Method for depositing thin layers of materials by decomposing a gas to yield a plasma
The invention provides a method of depositing a thin layer of material by decomposing a gas in a plasma. To avoid saturating the rate of depositing doped silicon, the substrate onto which the doped silicon is to be deposited has an RF bias applied thereto...
11/06/1979
4153560Corona device and method for using same
A corona discharge device is disclosed in which a cylindrical shell made of a dielectric material is mounted around a rotatable axle. Electrodes are arranged inside and outside of the shell so as to provide a corona discharge across a material to improve ...
05/08/1979
4140607Method for modifying the surface of polymeric substrate materials by means of electron bombardment in a low pressure gas discharge
A method of modifying the surface of polymeric substrate materials, such as textile fabric including woven polymeric textile or textile fibers, by means of electron bombardment in a low pressure gas discharge medium to produce chemical and/or physical cha...
02/20/1979
4133847Vaporized fuel for internal combustion engine and method and apparatus for producing same
An automobile engine is fueled with a mixture of air and a vapor derived by passing electric current through an electrolytically conductive emulsion of gasoline and water. Specific compositions of the conductive emulsions are disclosed as are unique desig...
01/09/1979
4123308Process for chemically bonding a poly-p-xylylene to a thermosetting resin and article produced thereby
Poly-p-xylylene is chemically bonded to a thermoset resin via a reaction between oxygen-containing groups at the surface of the poly-p-xylylene and a reactant component of the thermosetting resin. A low temperature plasma is employed to chemically modify ...
10/31/1978
4077870Method for electrically cracking petroleum crude
A method for electrically cracking crude oil comprised of the steps of injecting a mixture of petroleum crude and an energy transfer medium into a cracking chamber in a continuous flow, supplying a high frequency electrical discharge into the energy trans...
03/07/1978
4072769Treating polymeric surfaces
The surface characteristics of polymeric materials are altered by exposure to a reactive gas which has been activated by radio frequency electromagnetic radiations prior to being directed onto the surface. The reactive gas is selected from either the gase...
02/07/1978
4059497Corona apparatus
A corona apparatus comprising at least one roller electrode assembly, a supporting surface acting as a counter electrode, and a generator for generating an alternating current voltage for said electrode assembly characterized in that the roller electrode ...
11/22/1977
4029876Heat-treated, corona-treated polymer bodies and a process for producing them
Polymer films, such as polypropylene and polyethylene, having improved surface adhesion characteristics and produced by subjecting conventional polymer films to a heat treatment followed by a corona treatment at an energy density-to-film surface of at lea...
06/14/1977
4028551Apparatus and method for corona discharge priming a dielectric web
A dielectric web substrate is primed for adhesion of a plastic coating by passing between two rolls in rolling contact therewith. One roll has a conductive core and an insulating jacket while the other roll has a conductive surface. A high voltage A.C. so...
06/07/1977
4024038Adhesive processes
The method of modifying materials in a uniform and reproducible manner which comprises activating and treating materials, the treating step being performed with modification agent. There is also disclosed an apparatus for modifying materials....
05/17/1977
4018945Method of making a metallized video disc having an insulating layer thereon
A polymeric film applied to a video disc by glow discharge techniques is treated with a subsequent glow discharge in air to improve wear properties....
04/19/1977
4011843Vaporized fuel for internal combustion engine and method and apparatus for producing same
An automobile engine is fueled with a mixture of air and a vapor derived by passing electric current through an electrolytically conductive emulsion of gasoline and water. Specific compositions of the conductive emulsions are disclosed as are unique desig...
03/15/1977
4010089Reacting coal
Apparatus and method for reacting coal with hydrogen to provide hydrocarbon products. In a container having an anode and a cathode spaced therefrom, an electric potential about 200 to 1000 volts more positive than the potential at the cathode is applied t...
03/01/1977
3992495Method of manufacturing a semipermeable membrane from a water-soluble polymeric resin
Ultrathin membranes for separating substances are obtained by exposing shaped articles comprising a water-soluble polymer or a mixture of a water-soluble polymer and water-insoluble polymer to a plasma of a gas selected from helium, argon, nitrogen, hydro...
11/16/1976
3974750Method and apparatus for neutralizing electrostatic charges of filter material for smokers' products
Successive filter rod sections which are produced in a filter rod making machine are caused to pass through a body of ionized air before they leave the machine. This insures that ionized air destroys the electrostatic charges which the non-conductive wrap...
08/17/1976
3973132Apparatus for the treatment of non-conductive foils or like thin sheeting
Apparatus for the treatment of non-conductive foils or the like by subjecting them to a corona discharge of the type including two elongated electrodes with a gap between them and means for passing the foil or other sheeting through the gap has one of its...
08/03/1976
3959104Electrode structure for generating electrical discharge plasma
An electrical plasma discharge is established between adjacent tubular electrodes of an electrode structure having a stacked array of rows of tubular electrodes of opposite polarity row-by-row. A substrate is moved through the electrode structure along se...
05/25/1976
3959661Apparatus for purifying exhaust gases containing ionizable and oxidizable components
Apparatus for purifying exhaust gases having ionizable and oxidizable gaseous components including an exhaust chamber having the exhaust gases flowing therethrough, a particle filter mounted in the chamber, a plurality of spaced electrodes located in the ...
05/25/1976
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