Class 264/423 - Plasma (e.g., corona, glow discharge, etc.)

Subclass of Class 264 - Plastic and nonmetallic article shaping or treating: processes
Definition: Processes wherein the energy directly applied consists of
No. of patents: 34
Last issue date: 11/13/2007

Number	Title	Issue Date
7294175	Personal inhalation filter A cylindrical or other suitably shaped filter container for insertion into a user's nares to filter inhaled air to remove airborne items. The filter container has two open ends forming a container surrounding filter material. Polypropylene may be used to form the co...	11/13/2007
7244292	Electret article having heteroatoms and low fluorosaturation ratio An electret article that includes a polymeric material that has electric charge imparted thereto, that has one or more heteroatoms, that has a fluorosaturation ratio of less than 200, and that has an atomic percent fluorine of greater than about 40%. The inventive e...	07/17/2007
7211923	Rotational motion based, electrostatic power source and methods thereof A power system includes a member with two or more sections and at least one pair of electrodes. Each of the two or more sections has a stored static charge. Each of the pair of electrodes is spaced from and on substantially opposing sides of the member from the othe...	05/01/2007
7125603	Plasma treatment of porous materials The application discloses methods of plasma treatment that employ an ion sheath in a capacitively-coupled system to increase the hydrophilicity of porous articles, including microporous articles having pore sizes of 0.05 to 1.5 micrometers, both on their surfaces an...	10/24/2006
7056726	membrane for encapsulation chamber of cells producing at least a biologically active substance and bioartificial organ comprising same The invention concerns a semipermeable chamber for encapsulation of cells producing at least a biological substance of interest, characterised in that it consists of a porous polycarbonate biocompatible film modified at the surface by generated polar sites and cover...	06/06/2006
6959709	Manner of attaching component elements to filtration material such as may be utilized in respiratory masks A component is attached to filtration material by providing the component with a deformable extension member that is preferably integral with the component and that extends from a base portion of the component. The extension member is inserted through an opening pro...	11/01/2005
6953544	Method of making a respirator that has a fluorinated electret A method of making a respirator, which method includes placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer. The electret is disposed in the respirator body such that air passes through it before being inhaled by a resp...	10/11/2005
6939389	Method and apparatus for manufacturing fine powders The manufacture of pure, fine spherical powders has always been a problem for many materials, particularly for high-melting and highly reactive materials such as titanium, tantalum, vanadium and zirconium. The present invention provides a process and apparatus for p...	09/06/2005
6774155	Method for treating polymer materials and products produced therefrom The invention is directed to methods for fabricating devices from polymer precursors, along with devices so fabricated. The methods of the invention include the steps of plasma treating a polymer based resin, paste, preform billet, or extrudate, and employing the tr...	08/10/2004
6669823	Process for preparing nanostructured materials of controlled surface chemistry A process to prepare stoichiometric-nanostructured materials comprising generating a plasma, forming an "active volume" through introduction of an oxidizing gas into the plasma, before the plasma is expanded into a field-free zone, either (1) in a region ...	12/30/2003
6660210	Method of making fluorinated electrets An electret is described that includes a plasma surface modified polymeric article having plasma surface fluorination produced by fluorinating the polymeric article....	12/09/2003
6579604	Method of altering and preserving the surface properties of a polishing pad and specific applications therefor The present invention is directed, in general, to an improved material and method of planarizing a surface on a semiconductor wafer and, more specifically, to a method of altering the properties of polymers, preferably thermoplastic foam polymers, used in...	06/17/2003
6573311	Method for treating polymer materials and products produced therefrom The invention is directed to methods for fabricating devices from polymer precursors, along with devices so fabricated. The methods of the invention include the steps of plasma treating a polymer based resin, paste, preform billet, or extrudate, and emplo...	06/03/2003
6419871	Plasma treatment of filter media The present invention is drawn to an improved electrostatic filter medium comprising a web of electret fibers which have been treated with fluorine-containing plasmas at a deposition amount of about 0.03 g/m2 to about 1.5 g/m2 ; elec...	07/16/2002
6379605	Process for producing a 3-layer co-extruded biaxial-oriented polypropylene synthetic paper and transparent film for in-mold label Disclosed is a process for producing a three layers co-extrusion biaxially oriented polypropylene (hereinafter as BOPP) synthetic paper and transparent film for in-mold label. More particularly, the invention relates to a process for producing a three lay...	04/30/2002
6368543	Process using single screw extruder for producing a three layer co-extrusion biaxially oriented polypropylene synthetic paper of thickness 25~250 μm Disclosed is an improvement of a process for producing a three layers co-extrusion biaxially polypropylene(BOPP) synthetic paper of thickness 25~250 μm which is menufactured by using three single screw extruders By means of an improvement of a process fo...	04/09/2002
6364988	Process for producing a 3-layer co-extruded biaxially oriented polypropylene synthetic paper of thickness 25-250 μm Disclosed is a process for producing a 3-layer co-extruded biaxially polypropylene (hereinafter as BOPP) synthetic paper of thickness 25-250 μm. More particularly, the invention relates to a process for producing a 3-layer biaxially-oriented PP synthetic...	04/02/2002
6136439	Monolayer polymeric film and method of fabrication A monolayer printable polymeric film and method for making the film. The film is formed by mixing a structural material, such as polypropylene or polyethylene, with a printable material, such as vinyl-acetate or methacrylate, to form a unitary mixture pri...	10/24/2000
6080471	Non-woven fabric for alkali cell separator and process for producing the same The present invention provides a non-woven fabric for an alkali cell separator capable of preventing active materials from transfer, and having distinguished electrolyte solution absorbability and retainability in spite of a small areal weight and also pr...	06/27/2000
6068799	Method of making electret articles and filters with increased oily mist resistance An electret article can be made by quenching a molten blend containing a polymer and a performance-enhancing additive. The resulting low crystallinity material can be annealed and charged to produce a material for making electret filters having superior o...	05/30/2000
5830810	Nonwoven barrier and method of making the same A plasma sterilizable fabric which is subjected to charging, for example electrostatic charging, is provided. Plasma sterilizable fabrics may include nonwovens and laminate nonwovens. The plasma sterilizable fabrics may also be treated with an antistatic ...	11/03/1998
5688465	Method of corona treating a hydrophobic sheet material A method of preventing localized arcing to ground during treatment of a sheet material in a corona discharge field generated by a corona discharge apparatus having at least two electrodes, which method involves passing the sheet material to be treated thr...	11/18/1997
5643507	Filter media having an undulated surface Filter media is provided. The filter media comprises a web of melt blown microfibers having one surface substantially flat and the other surface having periodic wrinkle-like undulations. A method of making the filter media is also provided. The filter med...	07/01/1997
5552011	Process of 3-layer co-extruded biaxial oriented polypropylene (BOPP) synthetic paper The present invention is related to a process of manufacturing polyproylene (PP) synthetic paper and the product thereof, and particularly to a process of manufacturing synthetic paper by means of 3-layer co-extrusion wherein PP resin composite and resin ...	09/03/1996
5496507	Method of charging electret filter media A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge j...	03/05/1996
5275766	Method for making semi-permeable polymer membranes A method for making a semi-permeable microporous polymer sheet, useful as a separation membrane or the like, including extruding a melt-blended mixture of a high-temperature thermoplastic polymer and a leachable glass to form sheet and then leaching the g...	01/04/1994
5207909	Plasma polymer membrane (C-2564) The present invention is a membrane for separating aromatics from feeds which are mixtures of aromatics and saturates and for separating saturated linear hydrocarbons from feeds which are mixtures of saturated linear and saturated branched hydrocarbons. T...	05/04/1993
5073316	Process for producing a porous film A process for producing a porous film comprising polyolefin resin, a filler and an ester of dipentaerythritol having a ratio 3 to 70% residual OH groups....	12/17/1991
4976856	Process for preparing non-porous, selective membrane layers The invention relates to a process for preparing non-porous, selective membrane layers by contacting a permeable, continuous substrate (e.g. comprising a non-porous, permeable intermediate layer and a microporous support layer) with the glowing zone of a ...	12/11/1990
4929401	Method of making a reusable adhesive product A method for making removable, reusable adhesive products from soft, solvent-free rubber compositions is disclosed. The rubber compositions are packed together by molding them into thin coatings between a release film and a porous substrate to allow curin...	05/29/1990
4778634	Process for the manufacture of porous film A vapor and liquid permeable porous film suitable for disposable sanitary apparel structures is produced by first abrading an unoriented film by passing it through at least one set of at least two cooperating nip rollers, each having an abrasive grit surf...	10/18/1988
4548769	Process for producing semipermeable membrane A process for producing a semipermeable membrane having a high flux, excellent in solute rejection and useful for reverse osmosis, ultrafiltration and the like which comprises dipping a semipermeable membrane of acrylonitrile polymer containing 40-100% by...	10/22/1985
4283359	Process for producing polyacrylonitrile reverse osmotic membranes A process for producing polyacrylonitrile membranes for use in reverse osmosis, which comprises dissolving an acrylonitrile polymer in formamide (FA)-containing dimethylformamide (DMF) to prepare an acrylonitrile polymer solution for membrane formation; s...	08/11/1981
3992495	Method 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

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Class 264/423 - Plasma (e.g., corona, glow discharge, etc.)