Wilbers
Arnold Theodoor Marie Wilbers, Sittard NL
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20110203346 | COMPREHENSIVE TWO-DIMENSIONAL GAS CHROMATOGRAPHY - The invention provides a manual or automated method for eliminating or minimizing retention time shifts in comprehensive two-dimensional gas chromatography (abbreviated GCxGC). Under nominal identical conditions (identical column-set specifications and GCxGC oven temperature programming), the invention allows one to reproduce the two-dimensional retention times from one column-set to another, from one GCxGC to another or from one column outlet pressure to another. A procedure is described to manually or automatically adjust the head pressure of the primary column and the (effective) secondary column length to compensate for the two-dimensional retention time differences. | 08-25-2011 |
Daniel Matthew Wilbers, San Marcos, CA US
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20140046605 | LEAK DETECTION IN FLUID CONDUCTING CONDUIT - A method for detecting a leak in a fluid conducting conduit is disclosed. Inlet and outlet flowrates are measured for calculating a time derivative of average temperature of the fluid flowing in the fluid conducting conduit. A predicted difference in flowrate between a flowrate of fluid in the fluid conducting conduit adjacent the inlet and a flowrate of fluid in the fluid conducting conduit adjacent the outlet is calculated based on the calculated time derivative of the average temperature of the fluid flowing in the fluid conducting conduit. The predicted difference in flowrate is compared to a difference between the measured inlet flowrate and the measured outlet flowrate to determine whether a leak exists in the fluid conducting conduit. | 02-13-2014 |
Dennis Wilbers, Yamaguchi JP
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20090127735 | DOPE AND PROCESS FOR THE PRODUCTION OF FIBER FROM THE DOPE - The object of this invention is to provide a dope that has excellent formability and can be formed into a fiber, a film, pulp-shaped particles and the like by a wet method. The object of this invention is also to provide a process for the production of a fiber excellent in heat resistance, strength and elastic modulus. | 05-21-2009 |
Dennis Wilbers, Arnhem NL
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20130289234 | METHOD FOR OBTAINING HIGH-TENACITY ARAMID YARN - The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex. | 10-31-2013 |
20140070449 | PROCESS FOR COMBINED ROLLING AND STRETCHING OF TAPES - A process for rolling and stretching of a sheet into a tape is provided. A sheet may be rolled into a rolled sheet in the nip between two rolls of the calender and the rolled sheet is stretched immediately thereafter into a tape on the surface of one of the two calender rolls. The speed of the rolled sheet on the surface of the calender roll may be higher than the speed of the calender roll. The position of the start of the neck-down of the rolled sheet and the rate of neck-down can be easily controlled by the proposed process. | 03-13-2014 |
Dennis Wilbers, Iwakuni JP
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20100001433 | Method for obtaining high-tenacity aramid yarn - The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex. | 01-07-2010 |
Dennis Wilbers, Iwakuni-Shi JP
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20100121017 | POLYBENZAZOLES AND POLYBENZAZOLE PRECURSORS - The invention relates to a fiber, pulp, fibril, or fibrid comprising polybenzazole having a repeating unit of formula (I) or (II) wherein Ar | 05-13-2010 |
20100222544 | POLYAZOLE FIBER AND PROCESS FOR THE PRODUCTION THEREOF - This invention seeks to provide a fiber formed of an aromatic polyazole that has a high molecular weight and is excellent in mechanical properties such as elastic modulus, strength, etc., and a process for the production thereof. | 09-02-2010 |
Freerk Wilbers, Delft NL
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20120150323 | Artificial Hand - Artificial hand suitable for robotic applications or as a prosthesis, comprising a frame with a thumb and at least two fingers, and having a motor drive for adjusting the thumb and the fingers with respect to the frame, wherein the motor drive has a housing and an axle which is rotatably positioned within the housing, and wherein the housing is mounted in a first bearing supported by the frame to enable that the housing may rotate with regard to the frame, and that the thumb and fingers are drivingly connected with the housing and the axle respectively. | 06-14-2012 |
Ludger Wilbers, Niedernhausen DE
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20080196178 | Mixture of Water-Soluble Fibre-Reactive Dyes, Method for the Production Thereof, and Use of the Same - Dye mixtures including the dyes of the general formula (I) and dyes of the general formula (II) | 08-21-2008 |