Patents by Inventor Umaprasana Ojha

Umaprasana Ojha 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).

  • Patent number: 11174336
    Abstract: An elastomeric polymer, comprising (1) a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and (2) a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer. The soft segment comprises (a) at least 2% by weight of the soft segment of at least one polyether macrodiol, and/or at least one polycarbonate macrodiol; and (b) at least 2% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: November 16, 2021
    Assignee: University of Massachusetts Lowell
    Inventors: Rudolf Faust, Umaprasana Ojha
  • Patent number: 9631042
    Abstract: The present invention pertains to copolymers having one or more polyisobutylene segments and one or more biodegradable polymer segments, to methods of making such copolymers, to medical articles that contain such copolymers, and to methods of making such medical articles. According to certain aspects of the invention, copolymers are provided, which comprise a plurality of polyisobutylene segments and a plurality of biodegradable polymer segments. According to certain aspects of the invention, copolymers are provided, which comprise urethane linkages, urea linkages, amide linkages, ester linkages, anhydride linkages, carbonate linkages, linkages commonly described as “click” chemistry linkages, and combinations of two or more types of such linkages.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: April 25, 2017
    Assignees: BOSTON SCIENTIFIC SCIMED, INC., THE UNIVERSITY OF MASSACHUSETTS LOWELL
    Inventors: Mark Boden, Marlene C. Schwarz, Frederick H. Strickler, Rudolf Faust, Umaprasana Ojha, Tomoya Higashihara
  • Patent number: 9574043
    Abstract: An elastomeric polymer, comprising (1) a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and (2) a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer. The soft segment comprises (a) at least 2% by weight of the soft segment of at least one polyether macrodiol, and/or at least one polycarbonate macrodiol; and (b) at least 2% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: February 21, 2017
    Assignee: University of Massachusetts Lowell
    Inventors: Rudolf Faust, Umaprasana Ojha
  • Publication number: 20150203622
    Abstract: The present invention pertains to copolymers having one or more polyisobutylene segments and one or more biodegradable polymer segments, to methods of making such copolymers, to medical articles that contain such copolymers, and to methods of making such medical articles. According to certain aspects of the invention, copolymers are provided, which comprise a plurality of polyisobutylene segments and a plurality of biodegradable polymer segments. According to certain aspects of the invention, copolymers are provided, which comprise urethane linkages, urea linkages, amide linkages, ester linkages, anhydride linkages, carbonate linkages, linkages commonly described as “click” chemistry linkages, and combinations of two or more types of such linkages.
    Type: Application
    Filed: November 12, 2014
    Publication date: July 23, 2015
    Inventors: Mark Boden, Marlene C. Schwarz, Frederick H. Strickler, Rudolf Faust, Umaprasana Ojha, Tomoya Higashihara
  • Patent number: 8962785
    Abstract: An elastomeric polymer, comprising (1) a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and (2) a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer. The soft segment comprises (a) at least 2% by weight of the soft segment of at least one polyether macrodiol, and/or at least one polycarbonate macrodiol; and (b) at least 2% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: February 24, 2015
    Assignee: University of Massachusetts Lowell
    Inventors: Rudolf Faust, Umaprasana Ojha
  • Patent number: 8911760
    Abstract: The present invention pertains to copolymers having one or more polyisobutylene segments and one or more biodegradable polymer segments, to methods of making such copolymers, to medical articles that contain such copolymers, and to methods of making such medical articles. According to certain aspects of the invention, copolymers are provided, which comprise a plurality of polyisobutylene segments and a plurality of biodegradable polymer segments. According to certain aspects of the invention, copolymers are provided, which comprise urethane linkages, urea linkages, amide linkages, ester linkages, anhydride linkages, carbonate linkages, linkages commonly described as “click” chemistry linkages, and combinations of two or more types of such linkages.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: December 16, 2014
    Assignees: Boston Scientific Scimed, Inc., The University of Massachusetts Lowell
    Inventors: Mark Boden, Marlene C. Schwarz, Frederick H. Strickler, Rudolf Faust, Umaprasana Ojha, Tomoya Higashihara
  • Publication number: 20130079487
    Abstract: An elastomeric polymer, comprising (1) a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and (2) a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer. The soft segment comprises (a) at least 2% by weight of the soft segment of at least one polyether macrodiol, and/or at least one polycarbonate macrodiol; and (b) at least 2% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine.
    Type: Application
    Filed: November 20, 2012
    Publication date: March 28, 2013
    Inventors: Rudolf Faust, Umaprasana Ojha
  • Publication number: 20120077934
    Abstract: A method of synthesizing a functionalized polymer represented by the structural formula (I) comprising a step of reacting a polymer represented by structural formula (II) with a compound Nu1-M to nucleophilically substitute moiety X1 with moiety Nu1. Values and preferred values of the variables in formulas (I) and (II) are defined herein.
    Type: Application
    Filed: March 23, 2010
    Publication date: March 29, 2012
    Inventors: Rudolf Faust, Ranjan Tripathy, Umaprasana Ojha
  • Publication number: 20100179298
    Abstract: An elastomeric polymer, comprising (1) a hard segment in the amount of 10% to 60% by weight of the elastomeric polymer, wherein the hard segment includes a urethane, urea or urethaneurea; and (2) a soft segment in the amount of 40% to 90% by weight of the elastomeric polymer. The soft segment comprises (a) at least 2% by weight of the soft segment of at least one polyether macrodiol, and/or at least one polycarbonate macrodiol; and (b) at least 2% by weight of the soft segment of at least one polyisobutylene macrodiol and/or diamine.
    Type: Application
    Filed: January 12, 2010
    Publication date: July 15, 2010
    Applicant: University of Massachusetts Lowell
    Inventors: Rudolf Faust, Umaprasana Ojha
  • Publication number: 20100166820
    Abstract: The present invention pertains to copolymers having one or more polyisobutylene segments and one or more biodegradable polymer segments, to methods of making such copolymers, to medical articles that contain such copolymers, and to methods of making such medical articles. According to certain aspects of the invention, copolymers are provided, which comprise a plurality of polyisobutylene segments and a plurality of biodegradable polymer segments. According to certain aspects of the invention, copolymers are provided, which comprise urethane linkages, urea linkages, amide linkages, ester linkages, anhydride linkages, carbonate linkages, linkages commonly described as “click” chemistry linkages, and combinations of two or more types of such linkages.
    Type: Application
    Filed: December 30, 2009
    Publication date: July 1, 2010
    Applicants: BOSTON SCIENTIFIC SCIMED, INC., UNIVERSITY OF MASSACHUSETTS LOWELL
    Inventors: Mark Boden, Marlene C. Schwarz, Frederick H. Strickler, Rudolf Faust, Umaprasana Ojha, Tomoya Higashihara
  • Publication number: 20100069578
    Abstract: A method of synthesizing a compound of formula (IIIe), comprising a step of reacting a compound of formula (IIIc): A functional polymer of formula (XXXa): The variables in formulas (IIIc), (IIIe), and (XXXa) are defined herein.
    Type: Application
    Filed: June 1, 2007
    Publication date: March 18, 2010
    Inventors: Rudolf Faust, Umaprasana Ojha