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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Publication number: 20040106748Abstract: 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: ApplicationFiled: July 3, 2003Publication date: June 3, 2004Applicant: CALLAWAY GOLF COMPANYInventors: Val J. Cupples, David M. Bartels, Pijush K. Dewanjee, Humayun Khan, Steven S. Ogg
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Publication number: 20040106465Abstract: 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: ApplicationFiled: July 10, 2003Publication date: June 3, 2004Applicant: 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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Publication number: 20040092636Abstract: A golf ball core composed of a polybutadiene mixture containing zinc diacrylate with a particle size ranging from 3 to 5 microns. The golf ball core is preferably utilized with two-piece golf balls or solid three-piece golf balls. The golf ball core has a higher coefficient of restitution than a conventional core with a similar compression value. Alternatively, the golf ball core has a lower compression value than a conventional core with a similar coefficient of restitution value.Type: ApplicationFiled: November 7, 2002Publication date: May 13, 2004Applicant: Callaway Golf CompanyInventors: Rastko Gajic, Pijush K. Dewanjee
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Publication number: 20030228937Abstract: 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: May 31, 2002Publication date: December 11, 2003Applicant: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20030225243Abstract: 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: ApplicationFiled: August 9, 2002Publication date: December 4, 2003Applicant: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20030224876Abstract: 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. 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: May 31, 2002Publication date: December 4, 2003Applicant: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6648775Abstract: 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: June 11, 2002Date of Patent: November 18, 2003Assignee: Callaway Golf CompanyInventors: David M. Bartels, Michael S. Yagley, Pijush K. Dewanjee, Steven S. Ogg
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Publication number: 20030203770Abstract: A golf ball with a wound layer composed of thermoplastic elastomer thread is disclosed herein. The golf ball has a core, an optional boundary layer, a wound layer and a cover. The core is preferably composed of polybutadiene material. The optional boundary layer is preferably composed of a blend of ionomers. The cover is preferably composed of a thermosetting polyurethane material.Type: ApplicationFiled: April 29, 2002Publication date: October 30, 2003Applicant: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20030199340Abstract: A golf ball having a thermosetting polyurethane cover composed of a blend of polyurethane prepolymers is disclosed herein. The blend may be a dual blend with a TDI-based polyurethane prepolymer blended with a second diisocyanate polyurethane prepolymer, typically a PPDI-based polyurethane prepolymer. The blend may also be a tri-blend with a TDI-based polyurethane prepolymer blended with two other diisocyanate polyurethane prepolymers, typically two different PPDI-based polyurethane prepolymers. The golf ball has a durability of at least 3.5 on a shear test rating of the cover.Type: ApplicationFiled: May 21, 2003Publication date: October 23, 2003Applicant: CALLAWAY GOLF COMPANYInventors: Pijush K. Dewanjee, Steven S. Ogg
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Patent number: 6634965Abstract: The present invention is a golf ball having a core, a cover and a lattice structure aerodynamic pattern. The core has a diameter of 1.53 inches to 1.55 inches, and a PGA compression of 60 to 75 points. The cover has a thickness of 0.060 inch to 0.090 inch. The cover has a Shore D hardness less than 58 as measured on the golf ball. The golf ball has a COR that is greater than 0.782 points at 143 feet per second.Type: GrantFiled: May 8, 2002Date of Patent: October 21, 2003Assignee: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels, Geoffrey P. M. Goodman
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Patent number: 6620060Abstract: The present invention is a golf ball having a core, a cover and a lattice structure aerodynamic pattern. The core has a diameter of 1.53 inches to 1.55 inches, and a PGA compression of 60 to 75 points. The cover has a thickness of 0.060 inch to 0.090 inch. The cover has a Shore D hardness less than 58 as measured on the golf ball. The golf ball has a COR that is greater than 0.782 points at 143 feet per second.Type: GrantFiled: May 8, 2002Date of Patent: September 16, 2003Assignee: Callaway Golf CompanyInventors: Steven S. Ogg, Michael S. Yagley, David M. Bartels, Pijush K. Dewanjee, Geoffrey P. M. Goodman
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Publication number: 20030166819Abstract: A novel composition useful for golf ball covers that comprises a blend of a dilsocyanate/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: August 20, 1998Publication date: September 4, 2003Inventors: PIJUSH K. DEWANJEE, MICHAEL TZIVANIS, SANJAY M. KUTTAPPA
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Patent number: 6607686Abstract: 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: November 6, 2001Date of Patent: August 19, 2003Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20030153409Abstract: The present invention is a golf ball having a core, a cover and a lattice structure aerodynamic pattern. The core has a diameter of 1.50 inches to 1.56 inches, and a PGA compression of 55 to 70 points. The cover has a thickness of 0.60 inch to 0.90 inch. The cover has a Shore D hardness less than 64 on the golf ball. The golf ball has a ball velocity off a driver at a medium speed that is greater than 132.7 mph.Type: ApplicationFiled: April 17, 2003Publication date: August 14, 2003Applicant: CALLAWAY GOLF COMPANYInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels, Geoffrey P.M. Goodman
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Patent number: 6595872Abstract: 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: May 20, 2002Date of Patent: July 22, 2003Assignee: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Patent number: 6592472Abstract: 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 toluene diisocyanate 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: October 25, 2001Date of Patent: July 15, 2003Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6569034Abstract: A golf ball having a thermosetting polyurethane cover composed of a blend of polyurethane prepolymers is disclosed herein. The blend may be a dual blend with a TDI-based polyurethane prepolymer blended with a second diisocyanate polyurethane prepolymer, typically a PPDI-based polyurethane prepolymer. The blend may also be a tri-blend with a TDI-based polyurethane prepolymer blended with two other diisocyanate polyurethane prepolymers, typically two different PPDI-based polyurethane prepolymers. The golf ball has a durability of at least 3.5 on a shear test rating of the cover.Type: GrantFiled: May 14, 2002Date of Patent: May 27, 2003Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, Steven S. Ogg
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Publication number: 20030040379Abstract: A golf ball having a thermosetting polyurethane cover composed of a blend of polyurethane prepolymers is disclosed herein. The blend may be a dual blend with a TDI-based polyurethane prepolymer blended with a second diisocyanate polyurethane prepolymer, typically a PPDI-based polyurethane prepolymer. The blend may also be a tri-blend with a TDI-based polyurethane prepolymer blended with two other diisocyanate polyurethane prepolymers, typically two different PPDI-based polyurethane prepolymers. The golf ball has a durability of at least 3.5 on a shear test rating of the cover.Type: ApplicationFiled: May 14, 2002Publication date: February 27, 2003Applicant: Callaway Golf CompanyInventors: Pijush K. Dewanjee, Steven S. Ogg
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Publication number: 20030027665Abstract: 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: May 20, 2002Publication date: February 6, 2003Applicant: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Publication number: 20030027668Abstract: The present invention is a golf ball having a core, a cover and a lattice structure aerodynamic pattern. The core has a diameter of 1.53 inches to 1.55 inches, and a PGA compression of 60 to 75 points. The cover has a thickness of 0.060 inch to 0.090 inch. The cover has a Shore D hardness less than 58 as measured on the golf ball. The golf ball has a COR that is greater than 0.782 points at 143 feet per second.Type: ApplicationFiled: May 8, 2002Publication date: February 6, 2003Applicant: Callaway Golf CompanyInventors: Steven S. Ogg, Michael S. Yagley, David M. Bartels, Pijush K. Dewanjee, Geoffrey P.M. Goodman