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: 20220363844Abstract: The invention provides a method for the production of a cross-linked Thermoplastic Polyurethane (TPU) moulded article.Type: ApplicationFiled: October 8, 2020Publication date: November 17, 2022Inventors: Pijush K. Dewanjee, John Gilbert Guard
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Publication number: 20120056354Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: ApplicationFiled: November 9, 2011Publication date: March 8, 2012Applicants: PRIPRO POLYMERS INC., CALLAWAY GOLF COMPANYInventors: PIJUSH K. DEWANJEE, JOHN G. GUARD
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Patent number: 8003747Abstract: A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and/or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250° F. to 550° F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150° F. to 250° F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane/polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.Type: GrantFiled: August 1, 2008Date of Patent: August 23, 2011Assignees: Callaway Golf Company, PriPro Polymers, Inc.Inventors: Pijush K. Dewanjee, John G. Guard
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Publication number: 20100323056Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: ApplicationFiled: August 30, 2010Publication date: December 23, 2010Applicants: CALLAWAY GOLF COMPANY, PRIPRO POLYMERS INC.Inventors: PIJUSH K. DEWANJEE, JOHN G. GUARD
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Publication number: 20100303950Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: ApplicationFiled: August 12, 2010Publication date: December 2, 2010Applicant: CALLAWAY GOLF COMPANYInventors: PIJUSH K. DEWANJEE, JOHN G. GUARD
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Patent number: 7785522Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: GrantFiled: May 26, 2009Date of Patent: August 31, 2010Assignees: PriPro Polymers, Inc., Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard
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Publication number: 20090230587Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: ApplicationFiled: May 26, 2009Publication date: September 17, 2009Applicants: CALLAWAY GOLF COMPANY, PRIPRO POLYMERS INCORPORATEDInventors: PIJUSH K. DEWANJEE, JOHN G. GUARD
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Patent number: 7540990Abstract: A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.Type: GrantFiled: October 29, 2008Date of Patent: June 2, 2009Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard
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Publication number: 20080287639Abstract: A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and/or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250° F. to 550° F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150° F. to 250° F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane/polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.Type: ApplicationFiled: August 1, 2008Publication date: November 20, 2008Applicant: CALLAWAY GOLF COMPANYInventors: PIJUSH K. DEWANJEE, JOHN G. GUARD
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Patent number: 7417094Abstract: A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and/or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250° F. to 550° F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150° F. to 250° F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane/polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.Type: GrantFiled: November 18, 2004Date of Patent: August 26, 2008Assignees: PriPro Polymer, Inc., Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard
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Patent number: 7250008Abstract: 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: April 27, 2005Date of Patent: July 31, 2007Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard, Chris J. Wieland, Karl A. Clausen, Uday V. Deshmukh, Jesse Bolane, Roger Cleveland, Herbert Reyes, Augustin W. Rollinsoni, Robert R. Lang
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Patent number: 7244384Abstract: A novel method of manufacturing a golf ball. A golf ball made with this invention 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: May 9, 2000Date of Patent: July 17, 2007Assignee: TaylorMade-Adidas Golf CompanyInventors: Pijush K. Dewanjee, Michael J. Tzivanis, Sanjay M. Kuttappa, John A. Calabria, Katherine T. Sitler, Thomas C. Hobbs
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Patent number: 7244802Abstract: 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: September 7, 2004Date of Patent: July 17, 2007Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 7223181Abstract: 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: GrantFiled: August 20, 1998Date of Patent: May 29, 2007Assignee: TaylorMade-Adidas Golf CompanyInventors: Pijush K. Dewanjee, Michael Tzivanis, Sanjay M. Kuttappa
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Patent number: 7144335Abstract: A method for manufacturing a golf club head with an insert having a face plate is disclosed herein. The 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 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 preferably 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: May 19, 2006Date of Patent: December 5, 2006Assignee: Callaway Golf CompanyInventors: Joshua G. Breier, Wayne H. Byrne, Augustin W. Rollinson, Ronald K. Hettinger, Pijush K. Dewanjee, Herbert Reyes, John G. Guard, Robert R. Lang, Andrew Oldknow
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Patent number: 7115041Abstract: A method for manufacturing a golf club head with an insert having a face plate is disclosed herein. The 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 insert is preferably composed of a thermoplastic polyurethane material formed from a polytetramethylene ether glycol terminated hexamethylene diisocyanate prepolymer having a NCO group content of 8.0% to 12.0%, and a 1,4 butane diol. An adhesive is preferably 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: August 6, 2004Date of Patent: October 3, 2006Assignee: Callaway Golf CompanyInventors: John G. Guard, Joshua G. Breier, Wayne H. Byrne, Augustin W. Rollinson, Ronald K. Hettinger, Pijush K. Dewanjee, Herbert Reyes, Andrew Oldknow, Robert R. Lang
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Patent number: 7101952Abstract: 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 a diethyl-2,4-toluene-diamine and a second curing agent. A preferred polyurethane prepolymer is a polytetramethylene ether glycol terminated 4,4?-dicyclohexyl methane diisocyanate polyurethane 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: December 8, 2004Date of Patent: September 5, 2006Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 7070516Abstract: 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 5, 2005Date of Patent: July 4, 2006Assignee: Callaway Golf CompanyInventors: Pijush K. Dewanjee, John G. Guard
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Patent number: 7060777Abstract: 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 a polytetramethylene ether glycol terminated 4,4?-dicyclohexyl methane diisocyanate polyurethane 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: December 7, 2004Date of Patent: June 13, 2006Assignee: Callaway Golf CompanyInventor: Pijush K. Dewanjee
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Patent number: 7048648Abstract: A method for manufacturing a golf club head with an insert having a face plate is disclosed herein. The 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 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 preferably 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: May 19, 2004Date of Patent: May 23, 2006Assignee: Callaway Golf CompanyInventors: Joshua G. Breier, Wayne H. Byrne, Augustin W. Rollinson, Ronald K. Hettinger, Pijush K. Dewanjee, Herbert Reyes, John G. Guard, Robert R. Lang, Andrew Oldknow