Patents by Inventor Anthony G. Schaefer
Anthony G. Schaefer 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: 11834553Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.Type: GrantFiled: October 2, 2020Date of Patent: December 5, 2023Assignee: Nektar TherapeuticsInventors: Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20210024693Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.Type: ApplicationFiled: October 2, 2020Publication date: January 28, 2021Inventors: Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20160200867Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.Type: ApplicationFiled: March 21, 2016Publication date: July 14, 2016Inventors: Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Patent number: 9226969Abstract: Among other aspects, provided herein is a hydrohalide salt of a multi-arm water-soluble polyethylene glycol-drug conjugate, along with related methods of making and using the same. The hydrohalide salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding free base form of the conjugate.Type: GrantFiled: November 18, 2010Date of Patent: January 5, 2016Assignee: Nektar TherapeuticsInventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20150105519Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.Type: ApplicationFiled: May 21, 2014Publication date: April 16, 2015Applicant: NEKTAR THERAPEUTICSInventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20130231359Abstract: Among other aspects, provided herein is a hydrohalide salt of a multi-arm water-soluble polyethylene glycol-drug conjugate, along with related methods of making and using the same. The hydrohalide salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding free base form of the conjugate.Type: ApplicationFiled: November 18, 2010Publication date: September 5, 2013Applicant: Nektar TherapeuticsInventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20130143909Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.Type: ApplicationFiled: November 18, 2010Publication date: June 6, 2013Applicant: Nektar TherapeuticsInventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
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Publication number: 20120271000Abstract: Methods for preparing conjugates using polymeric reagents bearing a maleimide are provided. Also provided are compositions comprising the conjugates.Type: ApplicationFiled: June 21, 2012Publication date: October 25, 2012Applicant: Nektar TherapeuticsInventors: Antoni Kozlowski, John Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Patent number: 8227558Abstract: Methods for preparing polymeric reagents bearing a maleimide are provided. Also provided are related compositions.Type: GrantFiled: October 4, 2011Date of Patent: July 24, 2012Assignee: Nektar TherapeuticsInventors: Antoni Kozlowski, John R. Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Publication number: 20120022220Abstract: Methods for preparing polymeric reagents bearing a maleimide are provided. Also provided are related compositions.Type: ApplicationFiled: October 4, 2011Publication date: January 26, 2012Applicant: Nektar TherapeuticsInventors: Antoni Kozlowski, John Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Patent number: 8058385Abstract: Methods for preparing conjugates using polymeric reagents bearing a maleimide are provided. Also provided are compositions comprising the conjugates.Type: GrantFiled: November 4, 2010Date of Patent: November 15, 2011Assignee: Nektar TherapeuticsInventors: Antoni Kozlowski, John Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Publication number: 20110046315Abstract: Methods for preparing conjugates using polymeric reagents bearing a maleimide are provided. Also provided are compositions comprising the conjugates.Type: ApplicationFiled: November 4, 2010Publication date: February 24, 2011Applicant: Nektar TherapeuticsInventors: Antoni Kozlowski, John Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Patent number: 7872082Abstract: Methods for preparing polymeric reagents bearing a maleimide are provided. Also provided are compositions comprising the polymeric reagents, and conjugates prepared by polymeric reagents obtained by the described methods.Type: GrantFiled: July 19, 2006Date of Patent: January 18, 2011Assignee: Nektar TherapeuticsInventors: Antoni Kozlowski, John Handley, Anthony G. Schaefer, Brian Bray, Ryan Odom, Tony L. Sander
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Patent number: 6638459Abstract: A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R—(ao)n—Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure.Type: GrantFiled: August 20, 2002Date of Patent: October 28, 2003Assignee: BASF CorporationInventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Publication number: 20030047278Abstract: A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R—(ao)n—Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure.Type: ApplicationFiled: August 20, 2002Publication date: March 13, 2003Applicant: BASF CorporationInventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Patent number: 6464820Abstract: A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R—(ao)n—Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure.Type: GrantFiled: December 29, 2000Date of Patent: October 15, 2002Assignee: BASF CorporationInventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Patent number: 6451101Abstract: There is disclosed a parting agent comprising the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R-(ao)n-Y wherein: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof; n is about 1 to about 25; and Y represents a monofunctional isocyanate-reactive group. There is also disclosed the processes that may be utilized to produce the parting agent.Type: GrantFiled: December 29, 2000Date of Patent: September 17, 2002Assignee: BASF CorporationInventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Publication number: 20020123641Abstract: There is disclosed a parting agent comprising the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structureType: ApplicationFiled: December 29, 2000Publication date: September 5, 2002Inventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Publication number: 20020121327Abstract: A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R—(ao)n—Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure.Type: ApplicationFiled: December 29, 2000Publication date: September 5, 2002Inventors: Donald C. Mente, Li-Mei Lu, David D. Peters, Joe C. Wilson, Anthony G. Schaefer
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Patent number: 6346558Abstract: A polyester polyol composition comprising a phthalic anhydride-initiated polyester polyol, a C4-C6 hydrocarbon blowing agent, and an alkylene oxide modified silicone glycol compatibilizing agent having an HLB of from about 5 to about 8 is disclosed. The blowing agent is soluble in the polyol composition, thereby reducing the risks associated with such blowing agents in processes for making rigid polymer foam articles and providing rigid foams having good dimensional stability and improved insulation properties. An alkylene oxide and isocyanate modified silicone glycol compatibilizing agent is also disclosed.Type: GrantFiled: August 7, 2001Date of Patent: February 12, 2002Assignee: BASF CorporationInventors: David D. Peters, Robert E. Riley, Jimmy L. Patterson, Anthony G. Schaefer