Patents by Inventor Pijush K. Dewanjee
Pijush K. Dewanjee 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: 6992163Abstract: A curative blend for a thermosetting polyurethane material that allows for a polyurethane material with greater durability is disclosed herein. The curative blend is composed of 4,4?-methylenebis-(2,6-diethyl)-aniline and a second curing agent selected from the group consisting of N,N?-bis-alkyl-p-phenylenediamine, N,N?-dialkylamino-diphenylmethane with tetrapropoxylated ethylenediamine and an aliphatic diamine. A preferred polyurethane prepolymer is polytetramethylene ether glycol terminated toluene diisocyanate prepolymer. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: GrantFiled: July 3, 2003Date of Patent: January 31, 2006Assignee: Callaway Golf CompanyInventors: Val J. Cupples, David M. Bartels, Pijush K. Dewanjee, Humayun Khan, Steven S. Ogg
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Patent number: 6974854Abstract: A golf ball with a cover composed of a thermosetting polyurethane that has increased resistance to yellowing is disclosed herein. The golf ball of the present invention is able to accomplish this by providing a cover composed of a thermosetting polyurethane material formed from a polyurethane prepolymer and a curative composed of 20 to 40 parts 4,4?-methylenebis-(3-chloro,2,6-diethyl)-aniline and 80 to 60 parts diethyl 2,4-toluenediamine. The cover is preferably formed over a core and boundary layer.Type: GrantFiled: July 14, 2003Date of Patent: December 13, 2005Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6971960Abstract: An insert composed of a thermoplastic polyurethane materials is disclosed herein. The thermoplastic polyurethane insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The thermoplastic polyurethane insert preferably has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.Type: GrantFiled: December 2, 2003Date of Patent: December 6, 2005Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard
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Patent number: 6964622Abstract: The present invention is a golf ball (10) with a core (12) and a cover layer (14). The core is preferably a metal wall (15) defining a hollow space (17). The cover layer (14) is preferably composed of a highly neutralized terpolymer and a fatty acid based moiety.Type: GrantFiled: October 21, 2004Date of Patent: November 15, 2005Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6951519Abstract: A prepolymer blend for a thermosetting polyurethane material that allows for control of the reaction time is disclosed herein. The prepolymer blend is preferably composed of a polyurethane prepolymer and dimethyl methylphosphonate. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: GrantFiled: July 7, 2003Date of Patent: October 4, 2005Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, Michael S. Green, David M. Bartels
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Patent number: 6932721Abstract: The present invention is a golf ball that has a coefficient of restitution at 143 feet per second that is greater than 0.8015, and an USGA initial velocity less than 255.0 feet per second. The golf ball is preferably a solid three-piece golf ball with a thermosetting polyurethane cover, an ionomer blend intermediate layer and a polybutadiene core.Type: GrantFiled: July 21, 2003Date of Patent: August 23, 2005Assignee: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Patent number: 6913549Abstract: The present invention is a golf ball that has a coefficient of restitution that is greater than 0.8015 at 143 feet per second, and an USGA initial velocity less than 255.0 feet per second. The golf ball has a solid three-piece golf ball with a polybutadiene core, an ionomer blend intermediate layer, and a thermosetting polyurethane cover, with an aerodynamic surface geometry. The golf ball has an innersphere with a plurality of lattice members interconnected to form a plurality of polygons. Each of the lattice members has apex, such that the golf ball conforms with the USGA's golf ball diameter requirement of 1.680 inches.Type: GrantFiled: March 8, 2004Date of Patent: July 5, 2005Assignee: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Patent number: 6893358Abstract: A method for manufacturing a golf club head with a thermoplastic polyurethane insert is disclosed herein. The thermoplastic polyurethane insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The thermoplastic polyurethane insert has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.Type: GrantFiled: July 10, 2003Date of Patent: May 17, 2005Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, Herbert Reyes, Bart R. Fliers, David B. McGrath, Ronald K. Hettinger, Wayne H. Byrne, John G. Guard, Augustin W. Rollinson
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Patent number: 6887164Abstract: The iron golf club head (20) of the present invention is preferably composed of three main components: a periphery member 22, a central member 24 and a face plate 26. The periphery member (22) is preferably composed of a high density material such as a nickel-tungsten alloy. The central member (24) is preferably composed of a lightweight, non-metal material. The face plate (26) is preferably composed of a titanium alloy material. The iron golf club head (20) preferably has high moments of inertia Izz and Ixx.Type: GrantFiled: February 27, 2004Date of Patent: May 3, 2005Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard, Chris J. Wieland, Karl A. Clausen, Uday V. Deshmukh, Jesse Bolane, Robert R. Lang, Roger Cleveland, Herbert Reyes, Augustin W. Rollinson
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Publication number: 20040229715Abstract: The iron golf club head (20) of the present invention is preferably composed of three main components: a periphery member 22, a central member 24 and a face plate 26. The periphery member (22) is preferably composed of a high density material such as a nickel-tungsten alloy. The central member (24) is preferably composed of a lightweight, non-metal material. The face plate (26) is preferably composed of a titanium alloy material. The iron golf club head (20) preferably has high moments of inertia Izz and Ixx.Type: ApplicationFiled: February 27, 2004Publication date: November 18, 2004Applicant: CALLAWAY GOLF COMPANYInventors: Pijush K. Dewanjee, John G. Guard, Chris J. Wieland, Karl A. Clausen, Uday V. Deshmukh, Jesse Bolane, Robert R. Lang, Roger Cleveland, Herbert Reyes, Augustin W. Rollinson
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Publication number: 20040201133Abstract: A novel composition useful for golf ball covers that comprises a blend of a diisocyanate/polyol polyurethane prepolymer with a curing agent comprising a blend of slow-reacting diamine with a fast-reacting diamine such as dimethylthio 2,4-toluenediamine and diethyl 2,4-toluenediamine, respectively. A golf ball cover made with this composition exhibits the characteristic feel and playability of a balata cover with superior durability characteristics (cut and shear resistance) which exceed those of a balata or ionomer cover.Type: ApplicationFiled: March 16, 2004Publication date: October 14, 2004Inventors: Pijush K. Dewanjee, Michael Tzivanis
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Publication number: 20040186245Abstract: A golf ball with a cover composed of a thermosetting polyurethane that has increased resistance to yellowing is disclosed herein. The golf ball of the present invention is able to accomplish this by providing a cover composed of a thermosetting polyurethane material formed from a polyurethane prepolymer and a curative composed of 20 to 40 parts 4,4′-methylenebis-(3-chloro,2,6-diethyl)-aniline and 80 to 60 parts diethyl 2,4-toluenediamine. The cover is preferably formed over a core and boundary layer.Type: ApplicationFiled: July 14, 2003Publication date: September 23, 2004Applicant: CALLAWAY GOLF COMPANYInventor: Pijush K. Dewanjee
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Patent number: 6793864Abstract: A novel composition useful for golf ball covers that comprises a blend of a diisocyanate/polyol polyurethane prepolymer with a curing agent comprising a blend of slow-reacting diamine with a fast-reacting diamine such as dimethylthio 2,4-toluenediamine and diethyl 2,4-toluenediamine, respectively. A golf ball cover made with this composition exhibits the characteristic feel and playability of a balata cover with superior durability characteristics (cut and shear resistance) which exceed those of a balata or ionomer cover.Type: GrantFiled: February 4, 1998Date of Patent: September 21, 2004Assignee: Dunlop SportsInventors: Pijush K. Dewanjee, Michael Tzivanis
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Patent number: 6793867Abstract: A method of manufacturing golf balls is disclosed that prevents the cover from cracking due to thermal expansion of the core during the cover formation process. The method includes the forming a core. One or more optional boundary layers can be applied to the surface of the core. The core and any boundary layers are pre-heated such that the core and any boundary layer undergo volumetric thermal expansion. After the pre-heating, the cover of the ball is formed over the core and any boundary layer. The method of the present invention also decreases cover molding cycle times for golf balls.Type: GrantFiled: March 9, 2001Date of Patent: September 21, 2004Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6786837Abstract: A golf ball made by a process that prevents the cover from cracking due to thermal expansion of the core during the cover formation process. The method includes the forming a core. One or more optional boundary layers can be applied to the surface of the core. The core and any boundary layers are pre-heated such that the core and any boundary layer undergo volumetric thermal expansion. After the pre-heating, the cover of the ball is formed over the core and any boundary layer. The method of the present invention also decreases cover molding cycle times for golf balls.Type: GrantFiled: October 30, 2001Date of Patent: September 7, 2004Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, David L. Felker, Gary G. Marshall
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Patent number: 6787626Abstract: A curative blend for a thermosetting polyurethane material that allows for a polyurethane material with greater durability is disclosed herein. The curative blend is composed of 4,4′-methylenebis-(2,6-diethyl)-aniline and a second curing agent selected from the group consisting of N,N′-bis-alkyl-p-phenylenediamine, N,N′-dialkylamino-diphenylmethane with tetrapropoxylated ethylenediamine and an aliphatic diamine. A preferred polyurethane prepolymer is polytetramethylene ether glycol terminated toluene diisocyanate prepolymer. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: GrantFiled: August 9, 2002Date of Patent: September 7, 2004Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20040138008Abstract: A prepolymer blend for a thermosetting polyurethane material that allows for control of the reaction time is disclosed herein. The prepolymer blend is preferably composed of a polyurethane prepolymer and dimethyl methylphosphonate. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: ApplicationFiled: July 7, 2003Publication date: July 15, 2004Applicant: Callaway Golf CompanyInventors: Pijush K. Dewanjee, Michael S. Green, David M. Bartels
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Patent number: 6762273Abstract: A curative blend for a thermosetting polyurethane material that allows for a polyurethane material with greater durability is disclosed herein. The curative blend is preferably composed of N,N″-dialkylamino-diphenyl-methane in an amount of 25 to 75 parts per one hundred parts of the curative blend and 4,4″-methylenebis-(2,6-diethyl)-aniline in an amount of 25 to 75 parts per one hundred parts of the curative blend. A preferred polyurethane prepolymer is polytetramethylene ether glycol terminated toluene diisocyanate prepolymer. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: GrantFiled: May 31, 2002Date of Patent: July 13, 2004Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20040121854Abstract: The present invention is a golf ball that has a coefficient of restitution at 143 feet per second that is greater than 0.8015, and an USGA initial velocity less than 255.0 feet per second. The golf ball is preferably a solid three-piece golf ball with a thermosetting polyurethane cover, an ionomer blend intermediate layer and a polybutadiene core.Type: ApplicationFiled: July 21, 2003Publication date: June 24, 2004Applicant: CALLAWAY GOLF COMPANYInventors: Michael J. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Publication number: 20040116622Abstract: A curative blend for a thermosetting polyurethane material that allows for a polyurethane material with greater durability is disclosed herein. The curative blend is preferably composed of N,N′-dialkylamino-diphenyl-methane in an amount of 25 to 75 parts per one hundred parts of the curative blend and 4,4″-methylenebis-(2,6-diethyl)-aniline in an amount of 25 to 75 parts per one hundred parts of the curative blend. A preferred polyurethane prepolymer is polytetramethylene ether glycol terminated toluene diisocyanate prepolymer. The thermosetting polyurethane is preferably utilized as a cover for a golf ball. The cover is preferably formed over a core and boundary layer.Type: ApplicationFiled: November 20, 2003Publication date: June 17, 2004Applicant: Callaway Golf CompanyInventors: Pijush K. Dewanjee, David M. Bartels