Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7799255 | Melt spun elastic tape and process Articles such as melt spun elastic tape and heaving denier monofilament fibers are made from thermoplastic polyurethane (TPU) polymers. The process to make the articles involves using a substantially horizontal cooling to cool the melt spun articles. Preferably, the... | 09/21/2010 |
| 7485249 | Double-layer hollow membrane for bio-reactor applications In a method of manufacturing a double-layer membrane of different polymers or polymer mixtures with opposite blood-compatible and tissue-compatible surfaces, a first polymer solution of a blood-compatible polymer and a second solution of a tissue-compatible polymer ... | 02/03/2009 |
| 7361720 | Highly crystalline polypropylene with low xylene solubles The invention is directed to a polypropylene resin which has a Mw/Mn of less than 5, a melt flow rate of less than 7 g/10 min., a 1% secant flexural modulus of greater 5 than 300,000 psi and less than 2 wt. % xylene solubles. ... | 04/22/2008 |
| 7351338 | Porous membrane of vinylidene fluoride resin and process for producing the same There is provided a porous membrane of vinylidene fluoride resin which has pores of appropriate size and distribution and also excellent mechanical strength represented by tensile strength and elongation at break and is useful as a microfiltration membrane or a sepa... | 04/01/2008 |
| 7303609 | Manufacture of polyimide-hollow fibres A process for the manufacture of a polyimide hollow fibre comprising: (i) providing a dope solution comprising one or more polyimides dissolved in a solvent comprising 60-100 wt % N-methylpyrollidone and 0-40 wt % ethanol, (ii) providing a bore fluid, (iii) generati... | 12/04/2007 |
| 7201860 | Polyamide membrane with improved hydrolytic stability and method for production thereof The invention relates to a method for producing a hydrolytically stable polyamide membrane having an open-pored, microporous and sponge-like support-layer structure, using a process involving thermally induced liquid-liquid phase separation. A solution of an aliphat... | 04/10/2007 |
| 7169855 | Method for producing transparent polypropylene sheet and transparent polypropylene sheet An apparatus (1) for producing a transparent polypropylene sheet, which comprises a sheet formation means (11) for melt-kneading a resin composition comprising (A) 60 to 97 mass % of a polypropylene resin having an iostactic pentad proportion of 0.85 t... | 01/30/2007 |
| 7101929 | Polyolefin films with improved processing properties The present invention relates to a process for reducing water carry-over during the production of polyolefin films or polyolefin tapes which are passed through a waterbath, where the polyolefin formulation comprises polyolefin waxes. The results are that less water ... | 09/05/2006 |
| 7070721 | Method of making and using a hollow fiber microfiltration membrane A hollow fiber microfiltration (MF) membrane is provided. The casting solution used to make this membrane includes a fiber-forming polymer having a degree of polymerization greater than about 1000, a water-soluble polymer, an anhydride with about 2 to 12 carbon atom... | 07/04/2006 |
| 6972103 | Method and device for producing continuous plastic films, webs and sheets capable of forming optical images In a method and a device for continuously manufacturing films, webs, and sheets of plastics capable of forming optical images a melted plastic mass, pre-shaped as a sheet, is guided into a roller gap of a calender, the roller gap formed between a shaping engraving c... | 12/06/2005 |
| RE38773 | High performance biodegradable materials from oriented starch derivatives The present invention involves the synthesis of a series of amylose (starch) derivatives with various degrees of substitution and amylose/amylopectin ratios. These chains are chemically crosslinked and then mechanically deformed (stretched) to produce a biodegradabl... | 08/09/2005 |
| 6905646 | Methods of producing synthetic resin wire A method of producing a synthetic resin rod (wire), comprising: an extruding step of extruding a synthetic resin rod; a pre-cooling step of spraying a cooling medium on the rod to pre-cool the rod extruded down to ... | 06/14/2005 |
| 6887409 | Method and device for the production of cellulose fibers and cellulose filament yarns A method for the production of cellulose fibers or filaments from cell material, by the dry-wet extrusion method with aqueous amine oxides, in particular, N-methylmorpholine-N-oxide as solve is described comprising the following steps: a) dispersion of a cell materi... | 05/03/2005 |
| 6821599 | Porous acrylic fiber and fabric comprising the same, and method of producing the same Porous acrylic fibers produced by a method comprising subjecting a spinning dope containing 0.3 to 20 parts by weight of poly(vinyl acetate) relative to 100 parts of an acrylic copolymer to a wet spinning to give fibers, crimping and cutting the fibers, subjecting t... | 11/23/2004 |
| 6787216 | Method for manufacturing multiple channel membranes, multiple channel membranes and the use thereof in separation methods A method for manufacturing multiple channel membranes includes extruding a polymer solution through an extrusion nozzle wherein several needles are arranged through which a gas or liquid containing a coagulating agent is injected during extrusion, wherein the outer ... | 09/07/2004 |
| 6764627 | Method of making corrugated part A method for continuously forming molded parts includes providing an extruder; directing a hollow column of plastic material from the extruder; providing a plurality of die blocks each including planar end segments having differing geometry and joined by the interme... | 07/20/2004 |
| 6719935 | Process for forming bioabsorbable implants A process for forming a rod of bioabsorbable polymeric material includes extruding the material at a temperature above its melting point at a controlled rate of between 0.4 to 20 feet per minute to form a continuous rod. The continuous rod is then cooled by passing ... | 04/13/2004 |
| 6663809 | Wireless polymeric twist tie A twist tie, the twist tie incorporating a thermoplastic copolyester.... | 12/16/2003 |
| 6645619 | Modified polytrimethylene terephthalate The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weig... | 11/11/2003 |
| 6645406 | Differential velocity extrusion A method of an extruded membrane of solidified flowable material having a desired curvature comprising extruding flowable material through a die in a curved section; measuring a characteristic of said extruded material at a plurality of positions along sa... | 11/11/2003 |
| 6632389 | Underwater or under-hydrocarbon pelletizing of biologically-active-compound-containing melts A process for producing pellets comprising biologically active substances in which the biologically active substances are homogeneously dispersed in a matrix based on at least one thermoplastic polymer, which polymer has in aqueous medium a pH-dependent s... | 10/14/2003 |
| 6623639 | Solvent-resistant microporous polybenzimidazole membranes Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.... | 09/23/2003 |
| 6551538 | Vacuole-free polymer granulates A process for preparing a vacuole-free polymer is disclosed. Extruded polymer resin is cooled at a rate of less than 50° C./sec. to a temperature that is 1 to 20° C. above the glass transition temperature of the polymer resin and the resin is then cut.... | 04/22/2003 |
| 6482344 | Superabsorbent polymer fibers having improved absorption characteristics A method for providing improved absorbency against pressure characteristics to non-surface crosslinked superabsorbent polymer fibers.... | 11/19/2002 |
| 6403016 | Vacuum extrusion system and method A vacuum extrusion line of the horizontal barometric leg type includes a vacuum chamber having an extrusion die at one end and a water baffle immersion cooler at the other end for extracting the extrudate to atmosphere, extrudate shaping and sizing equipm... | 06/11/2002 |
| 6358451 | Grafted poly (p-phenylene terephthalamide) fibers Poly(p-phenylene terephthalamide) fibers are disclosed which have been grafted with nitrobenzyl, allyl, or nitrostilbene groups to increase adhesion of the fibers to rubber. A process for making the grafted fibers is, also, disclosed.... | 03/19/2002 |
| 6358450 | Process for using sodium benzoate as a nucleating agent for monoaxially oriented polypropylene film Using sodium benzoate as an additive or a nucleating agent in polypropylene film, specifically a uni- or mono-axially oriented polypropylene film, up to 1000 ppm reduces shrinkage and increases stretchability.... | 03/19/2002 |
| 6319457 | Method for extruding tubular film A method and apparatus is disclosed for lacing an extruded tube of a non derivatized cellulose through an S-wrap to collapse the tube to a flat width. The lacing to form the S-wrap is accomplished without slowing the extrusion speed. At the start of the e... | 11/20/2001 |
| 6274659 | Method of manufacturing polyester granules with improved photochemical and thermal stability, and its application The process for production of a heat-stable and light-fast product consisting of multifilaments, monofilaments or flock for textile and industrial applications includes mixing from 0.2 to 0.5% by weight, based on the amount of product, of a UV absorber ha... | 08/14/2001 |
| 6238606 | Process for preparing pellets of saponified ethylene/vinyl acetate copolymer In the method of continuously producing pellets by continuously extruding a saponified ethylene-vinyl acetate (EVOH) solution in a strand form into a coagulation liquid and then cutting the resulting strand, the ratio between the weight X of the coagulati... | 05/29/2001 |
| 6228262 | Polysulfone based hollow fiber membrane, and a process for preparing the same The present invention relates to produce a polysulfone based hollow fiber membrane, having high water permeable coefficient and excellent permeability with no deterioration of separation capability, characterized by using an internal coagulating liquid an... | 05/08/2001 |
| 6218532 | High performance biodegradable materials from oriented starch derivatives The present invention involves the synthesis of a series of amylose (starch) derivatives with various degrees of substitution and amylose/amylopectin ratios. These chains are chemically crosslinked and then mechanically deformed (stretched) to produce a b... | 04/17/2001 |
| 6213752 | Vacuum extrusion system and method A vacuum extrusion line of the horizontal barometric leg type includes a vacuum chamber 10 having an extrusion die 18 at one end and a water baffle immersion cooler 20 at the other end for extracting the extrudate to atmosphere, extrudate shaping and sizi... | 04/10/2001 |
| 6171526 | Method for making a grooved spacer for a telecommunications cable A calibration apparatus and method for making a grooved plastic spacer for a slotted core telecommunications cable. The method includes attaching a calibration apparatus having helically shaped calibration members to an extrusion die. The calibration memb... | 01/09/2001 |
| 6093350 | Sealable chamber extrusion apparatus and method with process controls An extrusion system utilizes single or tandem extruders and a mixer-cooler to extrude a foamable extrudate through a die in a sealable chamber. The foamable extrudate is shaped and calibrated within the chamber. The die is mounted on the end of a gel tube... | 07/25/2000 |
| 6054085 | Membrane A method of producing a membrane comprises providing a solution containing a plurality of polymers in a non-aqueous liquid solvent, at least one of the polymers (hereinafter referred to as the "first polymer") having been prepared by polymerizing at least... | 04/25/2000 |
| 6036465 | Apparatus for cooling extruded melt film The cooling of extruded melt film is improved by passing the film sequentially through two cooling baths one arranged above the other. A cooling roller is rotatably mounted in a first lower bath and passes with its cylindrical wall through a second upper ... | 03/14/2000 |
| 5932158 | Cellulose solutions and products made therefrom An optically anisotropic solution containing cellulose and inorganic acids of phosphorus contains 94-100 wt % of the following constituents: cellulose; phosphoric acid and/or its anhydrides; and water; and 0-6 wt % of other constituents. This solution can... | 08/03/1999 |
| 5919370 | Integral, multi-asymmetric, semi-permeable membrane Membranes suitable for use in haemodialysis include a separating layer A with a cut-off between 500 and 5,000,000, a support layer B and a layer C which partly determines the hydraulic permeability. The cut-off and hydraulic permeability can be set indepe... | 07/06/1999 |
| 5911928 | Method for the production of polyolefin resin granules A method for producing polyolefin resins granules are disclosed, which comprises extruding by using a homodirectional (co-rotating) twin-screw kneading extruder a polyolefin resin from a die nozzle having a diameter of less than 2 mm and a discharge amoun... | 06/15/1999 |
