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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7959851 | Method for forming strips of containers Strips containers are formed using two continuous webs in thermoformable and heat-sealable material facing each other. The webs are indexed along a feed line through different operating stations that transform the webs into a continuous strip of containers, each one... | 06/14/2011 |
| 7691318 | Process of making hollow fibers The invention provides a spinnerette assembly for forming hollow fibers. The spinnerette assembly contains an extrusion orifice and a fiber-forming material passage in communication with the extrusion orifice. A hollow needle extends through the extrusion orifice in... | 04/06/2010 |
| 7264023 | Weaved article or garment and method of making weaved article or garment A brand new and unexpected textured fabric or textile that can be used to provide articles of clothing (for humans and/or animals), wall hangings, home decorating articles, headwear, footwear, etc. The method transforms one dimensional fabric or textile into three d... | 09/04/2007 |
| 7217379 | Thermoplastic tube A method for producing a tube section from thermoplastic material, in which a tube section is extruded by means of an extruder which is provided with an extruder die having an inner core, which inner core defines an axial hollow space in the tube section, the tube s... | 05/15/2007 |
| 7163655 | Method and apparatus for extruding polymers employing microwave energy An apparatus and method for molding balloon catheters is disclosed. The balloon may be molded by providing a polymeric tube within a mold having an interior cavity in the shape of the desired balloon. Microwave energy, which may be generated by a gyrotron, may then ... | 01/16/2007 |
| 7037096 | Cellulose extrusion Apparatus for the production of extruded blown cellulose film from a solution of cellulose, water and an amine-oxide, which includes:—extrusion apparatus for continuously extruding a cellulose solution to produce a cellulose film;—solidifying apparatus for solid... | 05/02/2006 |
| 6969216 | Pressurized bladder canister for installation of cured in place pipe A process for lining an existing pipeline or conduit with a flexible resin impregnated cured in place liner by pulling in the liner and inflating an eversion bladder with air and curing the liner with flow-through steam without loss of pressure is provided. The blad... | 11/29/2005 |
| 6953307 | Apparatus for assembling a liner Apparatus for assembling a liner (25) from a plurality of longitudinal sections of flexible material (161, 162) having longitudinal edges adapted to be joined one to another to form the liner. The apparatus comprises a path means along which the longit... | 10/11/2005 |
| 6733718 | Method of manufacturing a tubular member made of synthetic material, and a tube and a sheath manufactured by the method The invention relates to a method of manufacturing a tubular member made of synthetic material, the method being of the type in which the tubular member is extruded. In the method, during extrusion of the tubular member, the extruded synthetic material is subjected ... | 05/11/2004 |
| 6521025 | Super selective hollow fibre membranes A hollow fibre membrane has an active layer (2) in which elongate polymer molecules (3) are longitudinally aligned essentially parallel to the extrusion direction to thereby define a plurality of spaced free volume cavities (4) which are particularly nume... | 02/18/2003 |
| 6368547 | Method for producing an extruded hollow plastic section Apparatus and method for producing a hollow plastic section by extrusion through a die in a horizontal direction. The die has an inner mandrel which forms the cavity in the section. A first sealing plug and a second sealing plug, which sealing plugs are s... | 04/09/2002 |
| 6214283 | Method for treating an extruded plastic section and extrusion installation therefor Method for treating an extruded plastic section having a hollow space and installation suitable for carrying out such a treatment. The installation includes an extruder which has a core for forming the hollow space in the section and, at a distance downst... | 04/10/2001 |
| 6019934 | Hollow extrusion using internal coolant The process according to the invention for producing large-bore thick-walled pipes made of polyethylene comprises extruding the polymer composition out of an annular die 3 and subsequently cooling the melt 7 emerging from the die 3 using water as the cool... | 02/01/2000 |
| 6001288 | Process for producing a hollow fiber membrane having a hydrophobic coating A process for producing a hollow fiber membrane, a hollow fiber membrane, and a dialyzer of hollow fiber membrane type is provided. The hollow fiber membrane is highly biocompatible, and the production process is quite simple and inexpensive. In the proce... | 12/14/1999 |
| 5853884 | Method for producing unsupported fiber bundles for HME and other filtration applications A method for forming a hollow fiber bundle unit for insertion into an assisted breathing device comprising spinning a hollow fiber or hollow fibers, collecting multiple fibers into a bundle, filling the walls of the hollow fibers within the hollow fiber b... | 12/29/1998 |
| 5820934 | Process for producing viscose hoses by precipitation The present invention relates to a method for the production of a fiber-reinforced cellulose tube by continuous coating of a fibrous non-woven fabric with an alkaline viscose solution which is neutralized by means of an acid-containing precipitating liqui... | 10/13/1998 |
| 5645872 | Apparatus for processing food into tubular shape A method and an apparatus for processing food into a tubular shape is provided in which a die for processing the food includes a guide plate having a material outlet and a cylindrical feed pin having a water outlet at its center co-axially housed in the m... | 07/08/1997 |
| 5514312 | Process for manufacturing a flexible tubular conduit having a jacket made of crosslinked polyethylene The present invention relates to a flexible tubular conduit with a jacket or tube made of crosslinked polyethylene, specially crosslinked polyethylene, and a method for manufacturing the conduit. A jacket or tube is made from polyethylene crosslinked by h... | 05/07/1996 |
| 5505897 | Method for forming a pipe A method for manufacturing plastic pipe such that the pipe has apertures formed therein when the pipe is viewed in cross-section, comprising the steps of having hot plastic flow through a die and subsequently be extruded through a die head to form an extr... | 04/09/1996 |
| 5489406 | Method of making polyvinylidene fluoride membrane A method of making a porous polymeric material by heating a mixture comprising polyvinylidene fluoride and a solvent system initially comprising a first component that is a latent solvent for polyvinylidene fluoride and a second component that is a non-so... | 02/06/1996 |
| 5395570 | Hollow fibre membrane extrusion Extrusion of hollow membranes is improved by coextruding a coating fluid layer about the extrudate of heated polymer solution with its interior lumen forming extrudate. The coating fluid is disposed between the forming hollow fiber and a cooling fluid, an... | 03/07/1995 |
| 5296188 | Methods for forming tubing utilizing suction and pneumatic pressure at the surface of the cooling plug The invention concerns a cooling plug for sizing the interior surface of thermoplastic extruded pipe. Vacuum and/or pneumatic pressure is applied at the surface of the plug. The pneumatic pressure may cause the inner wall to balloon outwardly to form bell... | 03/22/1994 |
| 5277851 | Process of making a porous hollow fiber membrane A method of making a porous polymeric material by heating a mixture of a thermoplastic polymer and a cationic or non-ionic surfactant having a hydrophilic-lipophilic balance range of 4.0 to 6.0 to a temperature and for a time sufficient for the polymer an... | 01/11/1994 |
| 5261988 | Making large-diameter pipe A large-diameter plastic pipe is made by extruding from an extruding-nozzle assembly a hollow thermoplastic strip having an outer rectangular cross section and formed with longitudinally extending outer walls and webs having inner surfaces and defining a ... | 11/16/1993 |
| 5258160 | Process and apparatus for producing elongated body of elastic modulus changing type A process and apparatus for producing an elongated body changing in elastic modulus longitudinally thereof with use of polymers without resulting in variations in the outside and inside diameters of the body even when the polymers are different in extrusi... | 11/02/1993 |
| 5225139 | Process for the manufacturing of a mechanically conditioned thermoplastic film with biaxially recoverable stresses A process of expanding plastics film is disclosed, together with an apparatus for performing that process, in which expansion of the plastics film is performed under the control of a liquid providing a stable hydraulic mass, by the downward extrusion and ... | 07/06/1993 |
| 5209883 | Fabrication of fluoropolymer hollow fibers for asymmetric membranes Asymmetric hollow fibers comprising a fluoropolymer, and a process for making such fibers. The hollow fibers are useful for making fluid separation membranes, especially gas separation membranes. In one embodiment of the process of this invention, a polym... | 05/11/1993 |
| 5167901 | Method of everting a tube In a tube eversion apparatus a first chamber in which the eversion pressure is developed is controllably sealed by a sphincter-type valve, the valve being in turn actuated by pressure developed in a preferably separately controllable and adjustable second... | 12/01/1992 |
| 5130065 | Method of preparing polyacrylonitrile hollow threads with asymmetric pore structure The process for production of polyacrylonitrile hollow threads with a stable, asymmetric pore structure by a dry-wet-spinning process with glycerine-based core liquids, definite draw and after treatment conditions and a treatment with alcohols and drying.... | 07/14/1992 |
| 5106567 | Method for producing a heat set article of thermoformed polyethylene terephthalate As an article of manufacture, an ovenable shaped article formed of polyethylene terephthalate having a degree of crystallinity of at least 20%, said crystallinity being substantially uniform over the whole of the shaped article, and a process and apparatu... | 04/21/1992 |
| 4975228 | Process for preparing membranes from tetrahalobisphenol polycarbonates A process for the preparation of a membrane comprising bisphenol-based polycabonate wherein at least 25 percent by weight of the bisphenol moieties are tetrahalogenated wherein the halogen is Cl or Br, and the membrane prepared by such process. The proces... | 12/04/1990 |
| 4898924 | Process for the production of biaxially oriented rigid rod heterocyclic liquid crystalline polymer films A process is disclosed for the production of biaxially oriented liquid crystal films. The process includes: (i) forming an anisotropic dope from a polymerization solution of rigid rod heterocyclic liquid crystalline polymers such as poly{[benzo(1,2-d:4,5-... | 02/06/1990 |
| 4871494 | Process for forming asymmetric gas separation membranes having graded density skins A process for forming high free volume, asymmetric gas separation membranes having graded density skins and macrovoid-free morphology from a solvent system comprising a Lewis acid, Lewis base, and a Lewis acid:base complex which dissolve hydrophobic polym... | 10/03/1989 |
| 4867934 | Production of hollow nylon fibers A microporous nylon hollow fiber is prepared by extruding a nylon spinning solution through an annular slit of an orifice into a quench liquid while simultaneously introducing a core liquid into the inside hollow portion of the extruded spinning solution ... | 09/19/1989 |
| 4814120 | Process for the preparation of collagen tubes A process for preparing collagen tubes includes extruding an aqueous gel containing about 1.5% native collagen through a cylindrical spinneret equipped with a central concentric tube designed to receive a part of a coagulation bath, followed by coagulatio... | 03/21/1989 |
| 4750873 | Device for the production of a tubular object In a device for the extrusion of a tube the extruded tube (2) is guided by a piston (20) placed inside said tube (2) at a distance from the extrusion head (1) the cooling of the extruded tube (2) is improved by means of nozzles (13) which spray water (5) ... | 06/14/1988 |
| 4744932 | Process for forming a skinless hollow fiber of a cellulose ester A skinless hollow fiber of a cellulose ester material is formed by providing an aqueous coagulation bath having a tube-in-ring jet immersed therein and extruding a spinning solution comprising at least one cellulose ester material and a solvent therefor d... | 05/17/1988 |
| 4708841 | Pipe plug apparatus and method for its use A pipe plug apparatus and method for its use are described herein. A pipe plug is provided which includes a first portion, and second and third portions which radially extend from the exterior surface of the first portion so as to surround the first porti... | 11/24/1987 |
| 4663107 | Method for the production of thermoplastic tubes A method for the production of thermoplastic tubes comprising: (1) extruding the thermoplastic tube of which the interior surface in a molten state by a heating unit disposed within the area of a mandrel near the nozzle of an extrusion mold, and (2) slidi... | 05/05/1987 |
| 4659532 | Internal dusting of film tubes composed of thermoplastics A process for providing film tubes with anti-blocking means in that the film tube is cooled internally by an aqueous suspension containing a suspended release agent directly after extrusion, the excess suspensions are sucked from the interior and the tube... | 04/21/1987 |
