Patents by Inventor Anthony J. Walder

Anthony J. Walder 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: 10905646
    Abstract: A polymer film suited to use as a face mask or transdermal patch includes at least 30 wt. % of a thermoplastic polyurethane polymer which is the reaction product of a first polyether polyol having a molecular weight of at least 3000 daltons, optionally, a second polyether polyol having a molecular weight of no more than 2500 daltons, at least one of a third polyol having a molecular weight of up to 800 daltons, and a chain extender, a diisocyanate, optionally, a catalyst. The film includes up to 5 wt. % water.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: February 2, 2021
    Inventors: Nancy S. Marchant, Pallavi Kulkarni, Anthony J. Walder, Paul M. Basone, Shawn Lankowski, Juan Cebrián Puche, Sandra Mendez, Mireia Martin
  • Patent number: 10899870
    Abstract: The thermoplastic polyurethane (TPU) compositions described herein have a very good snap back properties (also called rebound resilience) while still maintaining a good combination of other properties, including hardness, low-temperature flexibility, abrasion resistance, weather-ability, low density, or any combination thereof. This combination of properties make the TPU compositions described herein useful materials for applications where polyamide copolymers (COPA) and/or polyether block amide (PEBA) materials have traditionally been used over TPU.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: January 26, 2021
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: David Cozzens, Pallavi Kulkarni, Anthony J. Walder
  • Publication number: 20200362091
    Abstract: The thermoplastic polyurethane (TPU) compositions described herein have biodegradable and/or bioabsorbable hard and soft segments. The TPU hard segment can be formed from a polyisocyanate and a 2,5-substituted diketopiperazine.
    Type: Application
    Filed: August 6, 2020
    Publication date: November 19, 2020
    Inventors: Cathrin G. Kirchhoefer, Andrew P. Dove, Anthony J. Walder
  • Publication number: 20190389997
    Abstract: The thermoplastic polyurethane (TPU) compositions described herein have biodegradable and/or bioabsorbable hard and soft segments. The TPU hard segment can be formed from a polyisocyanate and a 2,5-substituted diketopiperazine.
    Type: Application
    Filed: March 31, 2017
    Publication date: December 26, 2019
    Inventors: Cathrin G. Kirchhoefer, Andrew P. Dove, Anthony J. Walder
  • Publication number: 20170319462
    Abstract: A polymer film suited to use as a face mask or transdermal patch includes at least 30 wt. % of a thermoplastic polyurethane polymer which is the reaction product of a first polyether polyol having a molecular weight of at least 3000 daltons, optionally, a second polyether polyol having a molecular weight of no more than 2500 daltons, at least one of a third polyol having a molecular weight of up to 800 daltons, and a chain extender, a diisocyanate, optionally, a catalyst. The film includes up to 5 wt. % water.
    Type: Application
    Filed: October 23, 2015
    Publication date: November 9, 2017
    Inventors: Nancy S. Marchant, Pallavi Kulkarni, Anthony J. Walder, Paul M. Basone, Shawn Lankowski, Juan Cebrián Puche, Sandra Mendez, Mireia Martin
  • Publication number: 20170226272
    Abstract: The thermoplastic polyurethane (TPU) compositions described herein have a very good snap back properties (also called rebound resilience) while still maintaining a good combination of other properties, including hardness, low-temperature flexibility, abrasion resistance, weather-ability, low density, or any combination thereof. This combination of properties make the TPU compositions described herein useful materials for applications where polyamide copolymers (COPA) and/or polyether block amide (PEBA) materials have traditionally been used over TPU.
    Type: Application
    Filed: October 1, 2015
    Publication date: August 10, 2017
    Applicant: Lubrizol Advanced Materials, Inc.
    Inventors: David Cozzens, Pallavi Kulkarni, Anthony J. Walder
  • Publication number: 20150368392
    Abstract: A clear hydrophobic TPU is provided by reacting (a) a hydrophobic polyol made from dimerised fatty acid, (b) a chain extender mixture of a linear diol chain extender and a branched diol chain extender, and (c) a diisocyanate. The preferred polyol is a C36 dimer fatty acid reacted with 1,6-hexane diol. The preferred chain extender mixture is a 75:25 weight ratio blend of 1,12-dodecane diol and 2-butyl-2-ethyl propane diol. The preferred process to make the TPU is a batch process which starts the reaction between about 60° C. to 70° C.
    Type: Application
    Filed: February 3, 2014
    Publication date: December 24, 2015
    Inventors: Donald A. Meltzer, Pallavi Kulkarni, Anthony J. Walder, Julius Farkas
  • Patent number: 5848995
    Abstract: An anti-infective medical article comprises a hydrophilic polymer having silver chloride bulk distributed therein. The hydrophilic polymer containing silver chloride may be a laminate over a base polymer. A method for making the article includes contacting the hydrophilic polymer with a solution of a soluble silver salt followed by a solution of a soluble chloride to give silver chloride bulk distributed throughout the polymer matrix. The polymer containing silver chloride may then be melt processed, such as by extruding or coextruding with the base polymer.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: December 15, 1998
    Inventor: Anthony J. Walder
  • Patent number: 5322659
    Abstract: A method to render a medical article antithrombogenic and/or anti-infective includes coextruding a base polymer with a hydrophilic laminating polymer having dispersed therein a quarternary salt complexing agent and steeping the extruded article in an aqueous solution of an antithrombogenic and/or anti-infective reagent whereby the reagent is absorbed along with water by the hydrophilic polymer and reacts with the complexing agent.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: June 21, 1994
    Assignee: Becton, Dickinson and Company
    Inventors: Anthony J. Walder, Donald D. Solomon, Gregory J. Mann
  • Patent number: 5064415
    Abstract: An obturator is provided which allows for placing and withdrawing of a single catheter obturator over an extended period of time so as to allow spaced intervals of use, and non-use of a catheter while in place in the patient's skin, while at the same time doing away with cumbersome, costly and time consuming administration and maintenance of saline and heparin locks. The device feeds the obturator in place for occluding the catheter lumen, when no fluids are being administered to the patient, and then may be retracted to a position allowing fluid feed through a supply tube connection to the catheter. The device includes a coating on the obturator rod which swells in contact with aqueous fluids to seal completely the catheter lumen which coating includes heparin to prevent clotting. Moreover, the entire internal functioning arrangement remains sterile during the entire period of use, thus avoiding infection.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: November 12, 1991
    Assignee: Becton, Dickinson and Company
    Inventors: Anthony J. Walder, Donald D. Solomon
  • Patent number: 4976697
    Abstract: An obturator is provided which allows for placing and withdrawing of a single catheter obturator over an extended period of time so as to allow speed intervals of use, and non-use of a catheter while in place in the patient's skin, while at the same time doing away with cumbersome, costly and time consuming administration and maintenance of saline and heparin locks. The device feeds the obturator in place for occluding the catheter lumen, when no fluids are being administered to the patient, and then may be retracted to a position allowing fluid feed through a supply tube connection to the catheter. The device includes a coating on the obturator rod which swells in contact with aqueous fluids to seal completely the catheter lumen which coating includes heparin to prevent clotting. Moreover, the entire internal functioning arrangement remains sterile during the entire period of use, thus avoiding infection.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: December 11, 1990
    Assignee: Becton, Dickinson and Company
    Inventors: Anthony J. Walder, Donald D. Solomon, Richard W. Beck, James M. Lambert, Timothy Ignatius, Mark Crawford
  • Patent number: 4948860
    Abstract: Melt processable polyurethaneureas are prepared from a diisocyanate, a macroglycol, a diol chain extender and a diamine chain extender. Water may be included as a reactant, and the polymer may contain an additive such as a radiopaque material. The invention includes a one-pot bulk polymerization method for preparation of the polymers.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: August 14, 1990
    Assignee: Becton, Dickinson and Company
    Inventors: Donald D. Solomon, Anthony J. Walder, Can B. Hu