Patents by Inventor Theodorus L. Hoeks
Theodorus L. Hoeks 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: 6562433Abstract: The present invention provides a composition comprising polycarbonate wherein the polycarbonate has a very low Fries content (e.g., above 5 ppm and below 360 ppm). The present invention also provides a polycarbonate having a very low Fries content which is made by the melt process. This polycarbonate has high ductility and high impact strength. The invention also provides a method for making these compositions. Another aspect of the invention is an optical disk comprising polycarbonate having a very low Fries content which is made by the melt process. Such optical disks resist breakage due to bending.Type: GrantFiled: September 18, 2000Date of Patent: May 13, 2003Assignee: General Electric CompanyInventors: Hiromi Ishida, Kenichi Ishiwa, Mitsuyasu Okamura, Tomoaki Shimoda, Theodorus L. Hoeks, Henricus H. M. van Hout, Monica M. Marugan, Patrick J. McCloskey, Joseph A. King, Jr., Paul M. Smigelski, Jr.
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Patent number: 6262218Abstract: Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.Type: GrantFiled: November 29, 1999Date of Patent: July 17, 2001Assignee: General Electric CompanyInventors: Kazushige Inoue, Hiromi Ishida, Tomoaki Shimoda, Theodorus L. Hoeks, Henricus H. M. van Hout, Monica M. Marugan, David M. Dardaris, Patrick J. McCloskey
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Patent number: 6194497Abstract: An anti-static thermoplastic resin composition of 90-99.95 weight % of a thermoplastic resin and correspondingly 10 to 0.05 weight % of a halogenated carbon sulfonic acid salt of a polysubstituted phosphonium compound such as a fluorinated phosphonium sulfonate and wherein the thermoplastic resin is either an aromatic polycarbonate, polyetherimide, polyester, polyphenylene ether, polyphenylene ether/styrene polymer blend, polyamide, polyketone, acrylonitrile-butadiene-styrene, blends thereof and blends thereof with other materials. Preferably the thermoplastic resin is a transparent aromatic polycarbonate.Type: GrantFiled: July 23, 1997Date of Patent: February 27, 2001Assignee: General Electric CompanyInventors: Johannes Gerardus Henricus Willems, Theodorus L. Hoeks
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Patent number: 6096853Abstract: A process has been surprisingly discovered that can produce a high heat carbonate polymer (i.e., one with a Tg greater that 150.degree. C.), without the drawbacks encountered in attempts to produce a high heat carbonate polymer. The process of the instant invention comprises the steps of:(1) reacting an aromatic amine with a dihydric phenol to prepare an aminophenol;(2) reacting an anhydride or dianhydride with the aminophenol to prepare a phenolic precursor; and(3) reacting the phenolic precursor with a carbonate precursor to prepare a high heat carbonate polymer.Type: GrantFiled: December 21, 1998Date of Patent: August 1, 2000Assignee: General Electric CompanyInventors: Valentina Amerik, Theodorus L. Hoeks, Parfait Jean Marie Likibi, Mark Nelson
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Patent number: 6087468Abstract: The disclosure describes reacting a multi-functional phenolic or carboxylic branching agent with a transesterification catalyst to form an organic salt prior to reactive extrusion of said organic salt branching agent with linear polycarbonate resin as a means to dramatically increase the efficiency of the branching agent in the preparation of branched polycarbonate.Type: GrantFiled: October 20, 1997Date of Patent: July 11, 2000Assignee: General Electric CompanyInventors: Theodorus L. Hoeks, Adrianus A. M. Kusters, Ye-Gang Lin, Patrick J. McCloskey, Raphael Mestanza, Pin-pin Wu
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Patent number: 6022943Abstract: Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.Type: GrantFiled: April 7, 1999Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: Kazushige Inoue, Hiromi Ishida, Tomoaki Shimoda, Theodorus L. Hoeks, Henricus H. M. van Hout, Monica M. Marugan, David M. Dardaris, Patrick J. McCloskey
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Patent number: 6022941Abstract: Polycarbonate can be branched by reactive extrusion using free radical chemistry. This technology combines the effect of free radical initiator and branching agent on polycarbonate during processing. Melt Strength of polycarbonate can be increased by addition of a triacrylate as branching agent and peroxide as radical initiator.Type: GrantFiled: April 1, 1998Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: Raphael Mestanza, Theodorus L. Hoeks, Johannes J. De Bont
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Patent number: 5936047Abstract: The weight average molecular weight of a polycarbonate resin is predictably reduced by reaction with a multifunctional aliphatic compound at a temperature of 250 C. to 350 C.Type: GrantFiled: August 18, 1997Date of Patent: August 10, 1999Assignee: General Electric CompanyInventors: Johannes J. De Bont, Theodorus L. Hoeks
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Patent number: 5576413Abstract: Polycarbonate compositions comprising copolymers of bis-(4-hydroxyphenyl)methane and 2,2-bis-(4-hydroxyphenyl)propane are described and they unexpectedly display high glass transition temperatures, high impact resistances, flame retardant properties and superior brittle ductile transition temperature.Type: GrantFiled: April 25, 1994Date of Patent: November 19, 1996Assignee: General Electric CompanyInventors: Jan Bussink, Henricus G. C. Denissen, Erwin M. A. Gijzen, Hendrik T. van de Grampel, Theodorus L. Hoeks, Henricus H. M. van Hout
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Patent number: 5558899Abstract: A method for the preparation of polysaccharide derivatives comprises reacting at least a saccharide, such as glucose, maltose or glucose syrup, a "food grade" polycarboxylic acid, such as citric acid, or inorganic acid, such as phosphoric acid, which also acts as catalyst, and optionally a polyol, such as serbitol, under the influence of electromagnetic waves to give a reaction product at a temperature of 140.degree.-300 .degree. C. Preferably, the envisaged reaction is carried out in a commercially available microwave oven having a wave frequency in the range of 900-2500 MHz. The products obtained can be incorporated as low-calorie "bulking agents" in diet foods, such as dessert, cake and the like.Type: GrantFiled: December 28, 1994Date of Patent: September 24, 1996Assignee: Cooperatie Suikerunie U.A.Inventors: Hendrika C. Kuzee, Theodorus L. Hoeks, Paulus J. Visschedijk
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Patent number: 5489639Abstract: A laser markable thermoplastic composition which contains a copper phosphate salt such as copper phosphate, copper sulfate, cupric hydroxide phosphate and copper thiocyanate. The copper phosphate salt is preferably added in an amount ranging from about 0.1 to 5 parts by weight and the copper phosphate salt preferably has a particle size less than 10 .mu.m. The laser markable thermoplastic composition can be laser marked to provide a visibly distinct and separately identifiable region which preferably differs in overall color from the base material by a Delta E value of at least 10-20.Type: GrantFiled: August 18, 1994Date of Patent: February 6, 1996Assignee: General Electric CompanyInventors: Rein M. Faber, Theodorus L. Hoeks, Andre Volkers
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Patent number: 5466733Abstract: The invention relates to a material which comprises at least 20% of polyphenylene ether and which comprises as a flame-retardant 0.05-10% by weight of a boron compound, for example, boric acid, B.sub.2 O.sub.3, borate, salts or borate esters related to the polyphenylene ether, as well as, optionally, a plasticiser and further conventionally used additives.Type: GrantFiled: January 24, 1994Date of Patent: November 14, 1995Assignee: General Electric CompanyInventors: Theodorus L. Hoeks, Christianus A. A. Claesen, Johannes H. G. M. Lohmeijer, James E. Pickett
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Patent number: 5182325Abstract: The flame-retardant properties of polymers with an aromatic main chain can be improved by incorporating therein a fluorine compound in combination with a boron compound.Type: GrantFiled: October 12, 1989Date of Patent: January 26, 1993Assignee: General Electric Co.Inventors: Christianus A. Claesen, Johannus H. G. M. Lohmeijer, Michael P. J. Boogers, Jan Bussink, Hermannus B. Savenije, Theodorus L. Hoeks, Johannes C. Gosens
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Patent number: 5166249Abstract: The invention relates to polymer mixtures which comprise a polyphenylene ether, a polyoctenylene and TiO.sub.2 or BaSO.sub.4. The presence of TiO.sub.2 or BaSO.sub.4 leads to an improvement of the mechanical properties.Type: GrantFiled: April 9, 1991Date of Patent: November 24, 1992Assignee: General Electric Co.Inventors: Theodorus L. Hoeks, Christian M. E. Bailly, Johannes H. G. M. Lohmeijer, Wilhelmus M. M. Roovers
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Patent number: RE38530Abstract: An anti-static thermoplastic resin composition of 90-99.95 weight % of a thermoplastic resin and correspondingly 10 to 0.05 weight % of a halogenated carbon sulfonic acid salt of a polysubstituted phosphonium compound such as a fluorinated phosphonium sulfonate and wherein the thermoplastic resin is either an aromatic polycarbonate, polyetherimide, polyester, polyphenylene ether, polyphenylene ether/styrene polymer blend, polyamide, polyketone, acrylonitrile-butadiene-styrene, blends thereof and blends thereof with other materials. Preferably the thermoplastic resin is a transparent aromatic polycarbonate.Type: GrantFiled: February 27, 2003Date of Patent: June 8, 2004Assignee: General Electric CompanyInventors: Johannes Gerardus Henricus Willems, Theodorus L. Hoeks