Patents by Inventor Gijsbertus de With
Gijsbertus de With has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8723204Abstract: A wavelength converting element (104), typically for a LED (101), is provided, comprising luminescent particles (105) dispersed in a matrix (106) comprising crosslinked polysiloxane. Crosslinked polysiloxanes are temperature stable, typically up to temperatures above 300° C., meaning that they are stable under normal operating conditions of light emitting diodes. Further, crosslinked polysiloxanes are stable towards exposure to light, meaning that they will not degrade/discolor as a consequence of high intensity light exposure. The polymeric wavelength converter can easily be shaped in different forms. This may lead to better outcoupling of the light from a LED-converter system.Type: GrantFiled: September 11, 2009Date of Patent: May 13, 2014Assignee: Koninklijke Philips N.V.Inventors: Ana C. De Carvalho Esteves, Roel Copic, Gijsbertus De With, Chrysostomus H. M. Maree, Niels Van Der Veen, Josephina C. M. Brokken-Zijp, Jozua Laven
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Patent number: 8187707Abstract: Hydrophobic film or coating, comprising primary particles, secondary particles, adhering to the surface of the primary particles and having an average diameter that is smaller than the average diameter of the primary particles, and a hydrophobic layer covering at least partly the surface of the secondary particles and adhering to that surface, characterized in that the secondary particles are adhering to the surface of the primary particles by covalent chemical bonds.Type: GrantFiled: May 22, 2006Date of Patent: May 29, 2012Assignee: DSM IP Assets B.V.Inventors: Rudolfus Antonius Theodorus Maria Van Benthem, Di Wu, Weihua Ming, Gijsbertus De With
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Publication number: 20110156081Abstract: A wavelength converting element (104), typically for a LED (101), is provided, comprising luminescent particles (105) dispersed in a matrix (106) comprising crosslinked polysiloxane. Crosslinked polysiloxanes are temperature stable, typically up to temperatures above 300° C., meaning that they are stable under normal operating conditions of light emitting diodes. Further, crosslinked polysiloxanes are stable towards exposure to light, meaning that they will not degrade/discolor as a consequence of high intensity light exposure. The polymeric wavelength converter can easily be shaped in different forms. This may lead to better outcoupling of the light from a LED-converter system.Type: ApplicationFiled: September 11, 2009Publication date: June 30, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Ana C. De Carvalho Esteves, Roel Copic, Gijsbertus De With, Chrysostomus H. M. Maree, Niels Van Der Veen, Josephina C. M. Brokken-Zijp, Jozua Laven
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Patent number: 7527866Abstract: Glass infiltrated metal oxide infrastructures are formed by providing a glass which is suitable for infiltration and compatible with the metal oxide infrastructure; heating the glass in a nitrogen rich environment; and infiltrating the metal oxide infrastructure with the glass. Stress corrosion in a glass infiltrated metal oxide infrastructure is avoided or reduced by heating a glass composition under a nitrogen gas atmosphere before infiltrating the metal oxide infrastructure.Type: GrantFiled: November 29, 2006Date of Patent: May 5, 2009Assignee: Nederlandse Oranisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TnoInventors: Leonardus Johannes Dortmans, Gijsbertus de With, Qingshan Zhu
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Publication number: 20090104347Abstract: Hydrophobic film or coating, comprising primary particles, secondary particles, adhering to the surface of the primary particles and having an average diameter that is smaller than the average diameter of the primary particles, and a hydrophobic layer covering at least partly the surface of the secondary particles and adhering to that surface, characterized in that the secondary particles are adhering to the surface of the primary particles by covalent chemical bonds.Type: ApplicationFiled: May 22, 2006Publication date: April 23, 2009Inventors: Rudolfus Antonius Theodorus Maria Van Benthem, Di Wu, Weihua Ming, Gijsbertus De With
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Patent number: 7387761Abstract: The invention relates to a method for manufacturing a composite of a porous metal oxide infrastructure and a glass infiltrated in the pores of the infrastructure, wherein the method comprises at least the following steps: providing a glass which is suitable for infiltration and compatible with the metal oxide infrastructure; heating the glass in a nitrogen rich environment; and infiltrating the metal oxide infrastructure with the glass. The invention also relates to a method for avoiding or reducing stress corrosion in a glass infiltrated metal oxide infrastructure, comprising heating a glass composition under a nitrogen gas atmosphere before infiltrating the metal oxide infrastructure. The invention further relates to a glass infiltrated metaloxide infrastructure obtainable by any of these methods.Type: GrantFiled: March 28, 2003Date of Patent: June 17, 2008Assignee: Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNOInventors: Leonardus Johannes Dortmans, Gijsbertus de With, Qingshan Zhu
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Publication number: 20070104940Abstract: Glass infiltrated metal oxide infrastructures are formed by providing a glass which is suitable for infiltration and compatible with the metal oxide infrastructure; heating the glass in a nitrogen rich environment; and infiltrating the metal oxide infrastructure with the glass. Stress corrosion in a glass infiltrated metal oxide infrastructure is avoided or reduced by heating a glass composition under a nitrogen gas atmosphere before infiltrating the metal oxide infrastructure.Type: ApplicationFiled: November 29, 2006Publication date: May 10, 2007Applicant: Nederlandse organisatie voor toegepast- natuurwetenschappelijk Onderzoek TNOInventors: Leonardus Dortmans, Gijsbertus de With, Qingshan Zhu
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Publication number: 20050181217Abstract: The invention relates to a method for manufacturing a composite of a porous metal oxide infrastructure and a glass infiltrated in the pores of the infrastructure, wherein the method comprises at least the following steps: providing a glass which is suitable for infiltration and compatible with the metal oxide infrastructure; heating the glass in a nitrogen rich environment; and infiltrating the metal oxide infrastructure with the glass. The invention also relates to a method for avoiding or reducing stress corrosion in a glass infiltrated metal oxide infrastructure, comprising heating a glass composition under a nitrogen gas atmosphere before infiltrating the metal oxide infrastructure. The invention further relates to a glass infiltrated metal oxide infrastructure obtainable by any of these methods.Type: ApplicationFiled: March 28, 2003Publication date: August 18, 2005Inventors: Leonardus Dortmans, Gijsbertus de With, Qingshan Zhu
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Patent number: 5635429Abstract: The invention relates to a substrate made from a novel type of ceramic material. This material comprises 44-47 at. % A1, 31-39 at. % O, 8-13 at. % C and 8-12 at. % N. Substrates made from this material exhibit a relatively high heat conductance, a relatively great strength and their coefficient of expansion is equal to that of Si. Consequently, the substrates in accordance with the invention are very suitable for use in the Si-semiconductor technology. The main component of the ceramic material of the substrates preferably corresponds to the formula Al.sub.28 O.sub.21 C.sub.6 N.sub.6. The invention also provides methods of manufacturing substrates and other mouldings from this material.Type: GrantFiled: July 17, 1996Date of Patent: June 3, 1997Assignee: U.S. Philips CorporationInventors: Wilhelm A. Grogen, Marcellinus J. Kraan, Paulus F. Van Hal, Gijsbertus De With
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Patent number: 5571757Abstract: The invention relates to a substrate made from a novel type of ceramic material. This material comprises 44-47 at. % Al, 31-39 at. % O, 8-13 at. % C and 8-12 at. % N. Substrates made from this material exhibit a relatively high heat conductance, a relatively great strength and their coefficient of expansion is equal to that of Si. Consequently, the substrates in accordance with the invention are very suitable for use in the Si-semiconductor technology. The main component of the ceramic material of the substrates preferably corresponds to the formula Al.sub.28 O.sub.21 C.sub.6 N.sub.6. The invention also provides methods of manufacturing substrates and other mouldings from this material.Type: GrantFiled: December 7, 1995Date of Patent: November 5, 1996Assignee: U.S. Philips CorporationInventors: Wihelm A. Groen, Marcellinus J. Kraan, Paulus F. Van Hal, Gijsbertus De With
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Patent number: 5411924Abstract: The invention provides a ceramic body and a method of manufacturing such a body. The body is characterized by its composition, which comprises 20-30 at. % of magnesium, 20-30 at. % of silicon, 40-60 at. % of nitrogen and maximally 15 at. % of oxygen. A preferred composition corresponds to the formula MgSiN.sub.2-x O.sub.x, where x is smaller than 0.5. The manufacture of the ceramic body in accordance with the invention is simpler and cheaper than that of aluminium nitride, and a number of properties of said ceramic material are better than those of the known aluminium oxide.Type: GrantFiled: February 15, 1994Date of Patent: May 2, 1995Assignee: U.S. Philips CorporationInventors: Wilhelm A. Groen, Marcellinus J. Kraan, Gijsbertus De With
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Patent number: 4988672Abstract: A superconductive thin layer of an oxidic material is manufactured by contacting at least two starting substtances with each other, after which diffusion and a chemical reaction in the solid state occur by means of increasing the temperature, while forming the superconductive thin layer.Type: GrantFiled: February 6, 1990Date of Patent: January 29, 1991Assignee: U.S. Philips CorporationInventors: Jan W. Severin, Gijsbertus De With, Dagobert M. De Leeuw, Cornelis A. H. A. Mutsaers
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Patent number: 4983572Abstract: A superconductive body of an oxidic superconductive material having good mechanical properties is characterized in that the oxidic material forms a matrix through which finely divided particles are mixed at least the surface of which consists of a metal or a metal alloy. Particles in the form of fibres are preferably used and the surface of the particles consists of silver or gold.Type: GrantFiled: August 25, 1988Date of Patent: January 8, 1991Assignee: U.S. Philips CorporationInventor: Gijsbertus De With
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Patent number: 4965249Abstract: A method of manufacturing a wire of superconducting oxidic material, in which a preform is used, which includes dispersions of a superconducting material and of a non-superconducting material in a binder or which includes dispersions of non-superconducting materials in a binder, in which latter case the materials can react while forming a superconducting compound, in which the preform is extruded to a wire, the binder is baked out and the wire is sintered.Type: GrantFiled: September 23, 1988Date of Patent: October 23, 1990Assignee: U.S. Philips CorporationInventors: Gijsbertus De With, Jan W. Severin
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Patent number: 4943559Abstract: A temperature sensor comprises a thin layer of material the composition of which varies gradually over the layer thickness. The material is superconductive below a critical temperature the value of which depends on the composition of the material. The layer is connected, by means of electrodes to an electronic circuit for supplying current to the sensor and processing a temperature-dependent signal produced by the sensor.Type: GrantFiled: February 27, 1989Date of Patent: July 24, 1990Assignee: U.S. Philips CorporationInventors: Jan W. Severin, Gijsbertus De With
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Patent number: 4923420Abstract: A powder mixture of yttrium and aluminum sulfates is prepared and heated in a oxidizing atmosphere. Silicon and/or magnesium compounds are added during the powder mixture preparation, or after it is heated and the resulting garnet powder is molded into the shape of a discharge envelope. The molding is then sintered.Type: GrantFiled: March 1, 1989Date of Patent: May 8, 1990Assignee: U.S. Philips Corp.Inventors: Gijsbertus De With, Hendricus J. A. Van Dijk
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Patent number: 4841195Abstract: The invention relates to a high-pressure discharage lamp comprising a discharge envelope having a wall of ceramic translucent material consisting mainly of densely sintered polycrystalline yttrium aluminium garnet (YAG). According to the invention, the material of the wall of the discharge envelope contains a single phase of YAG and at least one of the substances MgO and SiO.sub.2 in at total quantity of at least 50 ppm by weight, the absolute value of the difference between the SiO.sub.2 and MgO contents being at least 50 ppm by weight, and an excess of MgO at most 1000 ppm by weight. It has been found that the material can be sintered without external pressure, and a lamp according to the invention can then be obtained comprising a discharge envelope having a satisfactory transluecence and a high resistance to attacks of filling constituents.Type: GrantFiled: April 11, 1984Date of Patent: June 20, 1989Assignee: U.S. Philips CorporationInventors: Gijsbertus De With, Hendricus J. A. Van Dijk
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Patent number: 4665612Abstract: A magnetic head (32) having a magnet core (30) of ferrite and a layer of a bonding material (28) consisting of glass in the gap-forming area of the magnet core (38). In order to ensure that on the one hand the ferrite be not attacked by the glass during the bonding process and that on the other hand the temperature adjustment during the bonding process is not too critical, double layer diffusion barriers are provided between the layer of bonding material (28) and the core parts (10) and (10'), respectively, which barriers are formed by a layer of silicon nitride (26) on the side of the bonding layer (28) and a layer of silicon oxide (24) on the side of the core parts (10) and (10'), respectively.Type: GrantFiled: April 7, 1986Date of Patent: May 19, 1987Assignee: U.S. Philips CorporationInventors: Johannes P. M. Damen, Klaas Prijs, Cornelis H. M. Witmer, Gijsbertus de With
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Patent number: 4612689Abstract: A method of manufacturing multilayer ceramic capacitors characterized by the following steps:forming dielectric foils comprising a mixture of an organic binder with an oxidic ceramic powder;stacking these foils alternately with layers of electrically conductive material which function as electrodes;heating the stack to a previously determined temperature below the atmospheric pressure sintering temperature of the oxidic ceramic powder while simultaneously applying a uniaxial pressure in the direction of stacking to form a unit;releasing the pressure and cooling; andsevering the unit into individual capacitor bodies.Type: GrantFiled: October 1, 1984Date of Patent: September 23, 1986Assignee: U.S. Philips CorporationInventors: Willem R. de Wild, Gijsbertus de With, Henricus C. Smulders
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Patent number: 4600957Abstract: A magnetic head (32) includes a magnet core (30) of ferrite and a layer of a bonding material (28) consisting of glass in the gap-forming area of the magnet core (38). In order to ensure that the ferrite is not attacked by the glass during the bonding process and that the temperature adjustment during the bonding process is not too critical, double layer diffusion barriers are provided between the layer of bonding material (28) and the core parts (10), (10'), respectively. Each barrier is formed by a layer of silicon nitride (26) on the side of the bonding layer (28) and a layer of silicon oxide (24) on the side of the core.Type: GrantFiled: May 2, 1983Date of Patent: July 15, 1986Assignee: U. S. Philips CorporationInventors: Johannes P. M. Damen, Klaas Prijs, Cornelis H. M. Witmer, Gijsbertus de With