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: 6511388Abstract: A golf ball having a cover composed of a polyurethane formed from a p-phenylene diisocyanate (PPDI) based polyurethane prepolymer is disclosed herein. The PPDI-based polyurethane prepolymer is formed from a PPDI and a polyol such as polycaprolactone. The PPDI-based polyurethane prepolymer is cured with a curative such as a 1,4 butane diol and glycol. The PPDI-based polyurethane cover may be either thermoset or thermoplastic. The PPDI-based polyurethane cover has a high flexural modulus at a lower hardness which gives a better feel yet maintains good distance, higher Bashore resilience, higher tensile strength, higher tear resistance, improved elongation, and better playability and control. These benefits and improvements are exhibited even though the cover of the present invention is thinner than those of conventional golf balls. The present invention also provides new golf balls having durable thin covers thereby enabling golf balls with large cores.Type: GrantFiled: May 2, 2000Date of Patent: January 28, 2003Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20030017885Abstract: A golf club head with a polymer insert having indicia printed directly on its surface is disclosed herein. The polymer insert is disposed in a recess of the club head, and is preferably composed of a thermosetting material. Preferably, an UV curable ink is utilized for the indicia. The UV ink is printed on the external surface of the insert through a transfer pad printing process, and then cured with UV energy. Preferably, the golf club head is a putter, and the insert is composed of a thermosetting polyurethane. The insert is preferably white, and the indicia is preferably multi-colored.Type: ApplicationFiled: July 26, 2002Publication date: January 23, 2003Inventors: Kevin A. Heene, Darren F. Lawlor, Maxine J. Besaw, Clydene S.C. Nee, Herbert Reyes, Wayne H. Byrne, Pijush K. Dewanjee, Richard C. Helmstetter
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Patent number: 6503073Abstract: A method and system for casting a thermoset layer over a golf ball precursor product is disclosed herein. The system includes multiple stations connected by a conveyor system. The thermoset flowable material is dispensed into a plurality of cavities on each of the mold halves. A plurality of golf ball precursor products are then centered and inserted into the first mold half cavities. The mold halves are mated, heated and cooled. Then, at a de-molding station, the mold halves are separated and the thermoset layered golf balls are removed from the second mold half. A preferred thermoset material is a thermoset polyurethane.Type: GrantFiled: December 7, 2001Date of Patent: January 7, 2003Assignee: Callaway Golf CompanyInventors: Gary G. Marshall, Pijush K. Dewanjee
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Patent number: 6499983Abstract: A method and system for casting a thermoset layer over a golf ball precursor product is disclosed herein. The system includes multiple stations connected by a conveyor system. The thermoset flowable material is dispensed into a plurality of cavities on each of the mold halves. A plurality of golf ball precursor products are then centered and inserted into the first mold half cavities. The mold halves are mated, heated and cooled. Then, at a de-molding station, the mold halves are separated and the thermoset layered golf balls are removed from the second mold half. A preferred thermoset material is a thermoset polyurethane.Type: GrantFiled: November 2, 2001Date of Patent: December 31, 2002Assignee: Callaway Golf CompanyInventors: Gary G. Marshall, Pijush K. Dewanjee
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Publication number: 20020198065Abstract: 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: June 11, 2002Publication date: December 26, 2002Applicant: Callaway Golf CompanyInventors: David M. Bartels, Michael S. Yagley, Pijush K. Dewanjee, Steven S. Ogg
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Patent number: 6482345Abstract: A golf ball having a cover composed of a polyurethane formed from a p-phenylene diisocyanate (PPDI) based polyurethane prepolymer is disclosed herein. The PPDI-based polyurethane prepolymer is formed from a PPDI and a polyol such as polycaprolactone. The PPDI-based polyurethane prepolymer is cured with a curative such as a 1,4 butane diol and glycol. The PPDI-based polyurethane cover may be either thermoset or thermoplastic. The PPDI-based polyurethane cover has a high flexural modulus at a lower hardness which gives a better feel yet maintains good distance, higher Bashore resilience, higher tensile strength, higher tear resistance, improved elongation, and better playability and control. These benefits and improvements are exhibited even though the cover of the present invention is thinner than those of conventional golf balls. The present invention also provides new golf balls having durable thin covers thereby enabling golf balls with large cores.Type: GrantFiled: January 27, 2000Date of Patent: November 19, 2002Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6478697Abstract: 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: October 19, 2001Date of Patent: November 12, 2002Assignee: Callaway Golf CompanyInventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels
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Patent number: 6478690Abstract: The present invention is a golf club (30) having a club head main body (34) with a recess (38), an polymer insert (40) in the recess (38), an isolation layer (52) and a weight body (50). The polymer insert (40) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club (30) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body (50) is preferably composed of a tungsten alloy, and the isolation layer (52) is preferably composed of a thermoplastic polyurethane.Type: GrantFiled: December 10, 2001Date of Patent: November 12, 2002Assignee: Callaway Golf CompanyInventors: Richard C. Helmstetter, Ronald K. Hettinger, J. Neil Hall, Augustin W. Rollison, Kamal Sarkar, Joshua G. Breier, John G. Guard, Pijush K. Dewanjee
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Publication number: 20020165040Abstract: A golf club head having a face section with a polymer surface can provide a more efficient impact between a golf ball and the golf club head. By utilizing a polymer surface with desired material properties of stress, strain and damping levels, the face section will incur higher strain and strain rate levels than the golf ball. These lower internal stresses within the golf ball yield a more efficient impact with a golf club head.Type: ApplicationFiled: May 7, 2002Publication date: November 7, 2002Applicant: Callaway Golf CompanyInventors: John B. Kosmatka, David L. Felker, Pijush K. Dewanjee
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Publication number: 20020165045Abstract: 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: November 7, 2002Applicant: 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: 20020137579Abstract: The present invention is a golf ball having a core and a cover. 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 0.60 inch to 0.90 inch. The cover has a Shore D hardness less than 58 as measured on the land surface of the golf ball. The golf ball has a has a COR that is greater than 0.782 points at 143 feet per second.Type: ApplicationFiled: May 1, 2001Publication date: September 26, 2002Inventors: Pijush K. Dewanjee, Steven S. Ogg, David M. Bartels, Michael S. Yagley, Geoffrey P.M. Goodman
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Publication number: 20020137578Abstract: The present invention is a golf ball having a core and a cover. 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 as measured on the land surface of 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: January 23, 2001Publication date: September 26, 2002Inventor: Pijush K. Dewanjee
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Patent number: 6443858Abstract: 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 8, 2001Date of Patent: September 3, 2002Assignee: Callaway Golf CompanyInventors: David M. Bartels, Michael S. Yagley, Pijush K. Dewanjee, Steven S. Ogg
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Publication number: 20020119833Abstract: 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: November 6, 2001Publication date: August 29, 2002Inventor: Pijush K. Dewanjee
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Patent number: 6435987Abstract: 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: November 11, 2000Date of Patent: August 20, 2002Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 6425831Abstract: A golf club head with a polymer insert having indicia printed directly on its surface is disclosed herein. The polymer insert is disposed in a recess of the club head, and is preferably composed of a thermosetting material. Preferably, an UV curable ink is utilized for the indicia. The UV ink is printed on the external surface of the insert through a transfer pad printing process, and then cured with UV energy. Preferably, the golf club head is a putter, and the insert is composed of a thermosetting polyurethane. The insert is preferably white, and the indicia is preferably multi-colored.Type: GrantFiled: October 18, 2000Date of Patent: July 30, 2002Assignee: Callaway Golf CompanyInventors: Kevin A. Heene, Darren F. Lawlor, Maxine J. Besaw, Clydene S. C. Nee, Herbert Reyes, Wayne H. Byrne, Pijush K. Dewanjee, Richard C. Helmstetter
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Patent number: 6422954Abstract: A golf ball having a 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: November 11, 2000Date of Patent: July 23, 2002Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Publication number: 20020065144Abstract: The present invention is a golf club (30) having a club head main body (34) with a recess (38), an polymer insert (40) in the recess (38), an isolation layer (52) and a weight body (50). The polymer insert (40) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club (30) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body (50) is preferably composed of a tungsten alloy, and the isolation layer (52) is preferably composed of a thermoplastic polyurethane.Type: ApplicationFiled: December 10, 2001Publication date: May 30, 2002Applicant: Callaway Golf CompanyInventors: Richard C. Helmstetter, Ronald K. Hettinger, J. Neil Hall, Augustin W. Rollinson, Kamal Sarkar, Joshua G. Breier, John G. Guard, Pijush K. Dewanjee
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Patent number: 6395218Abstract: A method and system for casting a thermoset layer over a golf ball precursor product is disclosed herein. The system includes multiple stations connected by a conveyor system. The thermoset flowable material is dispensed into a plurality of cavities on each of the mold halves. A plurality of golf ball precursor products are then centered and inserted into the first mold half cavities. The mold halves are mated, heated and cooled. Then, at a de-molding station, the mold halves are separated and the thermoset layered golf balls are removed from the second mold half. A preferred thermoset material is a thermoset polyurethane.Type: GrantFiled: February 1, 2000Date of Patent: May 28, 2002Assignee: Callaway Golf CompanyInventors: Gary G. Marshall, Pijush K. Dewanjee
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Publication number: 20020061792Abstract: 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: October 19, 2001Publication date: May 23, 2002Inventors: Michael S. Yagley, Steven S. Ogg, Pijush K. Dewanjee, David M. Bartels