Patents by Inventor Charles M. Krutchen
Charles M. Krutchen 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: 5470521Abstract: An apparatus for thermally densifying thermoplastic articles, particularly those of the expendable type. The apparatus includes a chamber for placing the thermoplastic articles within, a heater for heating the thermoplastic articles placed within the chamber to a temperature effective for the thermal densification of the thermoplastic articles, a temperature sensor located proximate to the heater, and a controller for controlling the heater responsive to the temperature sensor, which is capable of providing a temperature within a range from about the temperature effective for thermally densifying thermoplastic articles to a temperature below the point of significant thermal degradation of the thermoplastic articles. A process for the thermal densification of thermoplastic articles are also provided.Type: GrantFiled: March 17, 1994Date of Patent: November 28, 1995Assignee: Mobil Oil CorporationInventors: Richard A. Wenzel, Lewis E. Sable, Charles M. Krutchen, Phillip A. Williams
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Patent number: 5356944Abstract: A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in.sup.2 and a density of about 6 lbs./ft.sup.3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the mixture through a die into an atmosphere of reduced pressure to form the foam structure.Type: GrantFiled: January 14, 1994Date of Patent: October 18, 1994Assignee: Mobil Oil CorporationInventors: James E. Blythe, Edward A. Colombo, Charles M. Krutchen, Phillip A. Williams, Wen-Pao Wu
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Patent number: 5286429Abstract: A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in.sup.2 and a density of about 6 lbs./ft.sup.3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the mixture through a die into an atmosphere of reduced pressure to form the foam structure.Type: GrantFiled: July 24, 1991Date of Patent: February 15, 1994Assignee: Mobil Oil CorporationInventors: James E. Blythe, Edward A. Colombo, Charles M. Krutchen, Phillip A. Williams, Wen-Pao Wu
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Patent number: 5269948Abstract: A method of decontaminating waste contaminated polystyrene involves dissolving the contaminated product in liquid styrene monomer at about room temperature and recovering the contaminant-free solution. The solution can be used as part of styrene feed stock for polymerization of styrene.Type: GrantFiled: August 21, 1992Date of Patent: December 14, 1993Assignee: Mobil Oil CorporationInventor: Charles M. Krutchen
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Patent number: 4752625Abstract: A method for forming a molded thermoplastic foam structure comprising partially filling a mold with solvent imbibed particles of a thermoplastic resin, pressurizing said mold under conditions such as to prevent vaporization of said blowing agent during subsequent polymer melting, heating said polymer to a flowable state, releasing the mold pressure to permit foaming of the melt and expansion of the foamed polymer within the mold.Type: GrantFiled: July 12, 1985Date of Patent: June 21, 1988Assignee: Mobil Oil CorporationInventors: Wen-Pao Wu, Charles M. Krutchen
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Patent number: 4665105Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: May 12, 1987Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4598104Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: July 1, 1986Assignee: Mobil Oil CompanyInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4598100Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: July 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4598098Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: July 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4598101Abstract: A polyphenylene oxide/polystyrene polymer blend foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming said foam comprising combining the polymer blend with a blowing agent member selected from the group consisting of methylene chloride, chloroform, 1,1,2-trichloroethane and mixtures thereof in molten form under pressure and extruding the same into a lower pressure region to form the foam.Type: GrantFiled: July 29, 1985Date of Patent: July 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4594208Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: June 18, 1984Date of Patent: June 10, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4587271Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: June 18, 1984Date of Patent: May 6, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4579878Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: November 9, 1984Date of Patent: April 1, 1986Assignee: Mobil Oil CompanyInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4579874Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 26, 1985Date of Patent: April 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4579873Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbided with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: April 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4579710Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: July 19, 1985Date of Patent: April 1, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4573345Abstract: A method for measuring the viscosity of a foamable plastics melt where accurate readings are difficult because of the melt material beginning to foam while in the rheometer test section slit. The pressure on the melt is elevated above the foaming point and maintained at an elevated level during the entire time during which the melt sample is diverted through the rheometer.Type: GrantFiled: July 12, 1984Date of Patent: March 4, 1986Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Raj Ranjan, Jan-Chin Yang
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Patent number: 4535100Abstract: A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.Type: GrantFiled: December 12, 1983Date of Patent: August 13, 1985Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu
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Patent number: 4532094Abstract: A method for forming a molded thermoplastic foam structure comprising partially filling a mold with solvent imbibed particles of a thermoplastic resin, pressurizing said mold under conditions such as to prevent vaporization of said blowing agent during subsequent polymer melting, heating said polymer to a flowable state, releasing the mold pressure to permit foaming of the melt and expansion of the foamed polymer within the mold.Type: GrantFiled: December 12, 1983Date of Patent: July 30, 1985Assignee: Mobil Oil CorporationInventors: Wen-Pao Wu, Charles M. Krutchen
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Patent number: 4532263Abstract: A method for forming a molded polymer foam structure comprising expanding solvent imbibed polymer particles selected from the group consisting of a polyetherimide, a polycarbonate and a polyphenylene oxide-polystyrene blend and fusing the expanded particles together in a mold.Type: GrantFiled: December 12, 1983Date of Patent: July 30, 1985Assignee: Mobil Oil CorporationInventors: Charles M. Krutchen, Wen-Pao Wu