Patents by Inventor Charles M. Leir

Charles M. Leir 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).

  • Publication number: 20090143557
    Abstract: Cyclic silazanes containing an oxamido ester group and methods of making these compounds are described. The compounds can be used, for example, to make oxamido ester-terminated siloxanes, which can be precursors for the preparation of various polymeric materials such as, for example, polydiorganosiloxane polyoxamides.
    Type: Application
    Filed: February 10, 2009
    Publication date: June 4, 2009
    Inventors: Charles M. Leir, Karl E. Benson, Richard G. Hansen
  • Publication number: 20090133832
    Abstract: Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a precursor having at least one polydiorganosiloxane segment and at least two oxalyamino groups. The polydiorganosiloxane polyoxamide block copolymers are of the (AB)n type.
    Type: Application
    Filed: January 29, 2009
    Publication date: May 28, 2009
    Inventors: Charles M. Leir, Karl E. Benson, Richard G. Hansen, Mark D. Purgett, Albert I. Everaerts, Audrey A. Sherman
  • Patent number: 7521516
    Abstract: Soluble polymers and methods for the preparation thereof, wherein the polymers of the present invention have pendant acylsulfonamide amine-reactive groups that can be used for the capture of amine containing materials.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: April 21, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, G. Marco Bommarito, Albert I. Everaerts, Brinda B. Lakshmi, Charles M. Leir, George G. I. Moora, Lang N. Nguyen, Rahul Shah, Peter A. Stark
  • Patent number: 7507849
    Abstract: Cyclic silazanes containing an oxamido ester group and methods of making these compounds are described. The compounds can be used, for example, to make oxamido ester-terminated siloxanes, which can be precursors for the preparation of various polymeric materials such as, for example, polydiorganosiloxane polyoxamides.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: March 24, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Charles M. Leir, Karl E. Benson, Richard G. Hansen
  • Patent number: 7501184
    Abstract: Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a precursor having at least one polydiorganosiloxane segment and at least two oxalyamino groups. The polydiorganosiloxane polyoxamide block copolymers are of the (AB)n type.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: March 10, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Charles M. Leir, Karl E. Benson, Richard G. Hansen, Mark D. Purgett, Albert I. Everaerts, Audrey A. Sherman
  • Publication number: 20080319154
    Abstract: Cyclic silazanes containing an oxamido ester group and methods of making these compounds are described. The compounds can be used, for example, to make oxamido ester-terminated siloxanes, which can be precursors for the preparation of various polymeric materials such as, for example, polydiorganosiloxane polyoxamides.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Inventors: Charles M. Leir, Karl E. Benson, Richard G. Hansen
  • Publication number: 20080249315
    Abstract: Multifunctional compounds having acylsulfonamide amine-reactive groups are described that can be used for the capture of amine containing materials.
    Type: Application
    Filed: June 17, 2008
    Publication date: October 9, 2008
    Inventors: Karl E. Benson, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G.I. Moore, Rahul Shah
  • Publication number: 20080227169
    Abstract: A method for immobilizing an amino-containing material to a substrate is described. The method involves providing a tethering compound with two reactive groups: a substrate reactive group and a fluoroalkoxycarbonyl group. The method further involves preparing a substrate-attached tethering group by reacting the substrate reactive group of the tethering compound with a complementary functional group on the surface of a substrate. The substrate-attached tethering group has a fluoroalkoxycarbonyl group that can be reacted with an amino-containing material to form an immobilization group that connects the amino-containing material to the substrate.
    Type: Application
    Filed: September 17, 2007
    Publication date: September 18, 2008
    Inventors: Karl E. Benson, Charles M. Leir, George G.I Moore, Rahul R. Shah
  • Patent number: 7423155
    Abstract: Compounds having two reactive functional groups are described that can be used as a tethering compound to immobilize an amine-containing material to a substrate. The first reactive functional group can be used to provide attachment to a surface of a substrate. The second reactive functional group is a N-sulfonyldicarboximide group that can be reacted with an amine-containing material, particularly a primary aliphatic amine, to form a connector group between the substrate and the amine-containing material. The invention also provides articles and methods for immobilizing amine-containing materials to a substrate.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: September 9, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, Moses M. David, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G. I. Moore, Rahul R. Shah
  • Publication number: 20080199620
    Abstract: Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a polydiorganosiloxane precursor having oxalylamino groups. The polydioroganosiloxane polyoxamide block copolymers are of the (AB)n type.
    Type: Application
    Filed: April 29, 2008
    Publication date: August 21, 2008
    Inventors: Audrey A. Sherman, Richard G. Hansen, Wendi J. Winkler, Charles M. Leir, Mieczyslaw H. Mazurek, Karl E. Benson, Mark D. Purgett, Albert I. Everaerts
  • Publication number: 20080187750
    Abstract: Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a polydiorganosiloxane precursor having oxalylamino groups. The polydiorganosiloxane polyoxamide block copolymers are of the (AB)n type.
    Type: Application
    Filed: April 9, 2008
    Publication date: August 7, 2008
    Inventors: Audrey A. Sherman, Richard G Hansen, Wendi J. Winkler, Charles M. Leir, Mieczyslaw H. Mazurek, Karl E. Benson, Mark D. Purgett, Albert I. Everaerts
  • Patent number: 7402678
    Abstract: Multifunctional compounds having acylsulfonamide amine-reactive groups are described that can be used for the capture of amine containing materials.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: July 22, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G. I. Moore, Rahul Shah
  • Publication number: 20080153175
    Abstract: Amino-containing materials can be attached to polymeric materials having a pendant amine capture group that includes a fluoroalkoxycarbonyl group. An amino-containing material can react with the pendant amine capture group by a nucleophilic substitution reaction. The product of the reaction is an alcohol and a pendant group that contains a carbonylimino group. The reaction results in the connection of the amino-containing material to the polymeric material. The polymeric materials are often disposed on a surface of a substrate and the connection of the amino-containing material to the polymeric material results in the immobilization of the amino-containing material on the substrate.
    Type: Application
    Filed: September 17, 2007
    Publication date: June 26, 2008
    Inventors: George G.I. Moore, Charles M. Leir, Rahul R. Shah
  • Patent number: 7390351
    Abstract: An electret filter media that includes a thermoplastic resin and a compound of the formula Y2-A(R1)n—Y1, where A is benzene, naphthalene or anthracene, Y1 and Y2 are each independently R2-R3, R2 is an ester linking group or an amide linking group, R3 is an alkyl group having from 10 to 22 carbon atoms, R1 is R2-R3 where R2 and R3 are each independently as defined above, and when A is benzene, n is from 0 to 4, when A is naphthalene, n is from 0 to 6, and when A is anthracene, n is from 0 to 8.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: June 24, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Charles M. Leir, Rahul R. Shah, Karl E. Benson
  • Publication number: 20080145907
    Abstract: Compounds having two reactive functional groups are described that can be used as a tethering compound to immobilize an amine-containing material to a substrate. The first reactive functional group can be used to provide attachment to a surface of a substrate. The second reactive functional group is a N-sulfonyldicarboximide group that can be reacted with an amine-containing material, particularly a primary aliphatic amine, to form a connector group between the substrate and the amine-containing material. The invention also provides articles and methods for immobilizing amine-containing materials to a substrate.
    Type: Application
    Filed: November 19, 2007
    Publication date: June 19, 2008
    Inventors: Karl E. Benson, Moses M. David, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G. Moore, Rahul R. Shah
  • Publication number: 20080132665
    Abstract: Soluble polymers and methods for the preparation thereof, wherein the polymers of the present invention have pendant acylsulfonamide amine-reactive groups that can be used for the capture of amine containing materials.
    Type: Application
    Filed: January 3, 2008
    Publication date: June 5, 2008
    Inventors: Karl E. Benson, G. Marco Bommarito, Albert I. Everaerts, Brinda B. Lakshmi, Charles M. Leir, George G.I. Moora, Lang N. Nguyen, Rahul Shah, Peter A. Stark
  • Patent number: 7371464
    Abstract: Polydiorganosiloxane polyoxamide, linear, block copolymers and methods of making the copolymers are provided. The method of making the copolymers involves reacting a diamine with a polydiorganosiloxane precursor having oxalylamino groups. The polydioroganosiloxane polyoxamide block copolymers are of the (AB)n type.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: May 13, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Audrey A. Sherman, Richard G. Hansen, Wendi J. Winkler, Charles M. Leir, Mieczyslaw H. Mazurek, Karl E. Benson, Mark D. Purgett, Albert I. Everaerts
  • Patent number: 7361767
    Abstract: Compounds having two reactive functional groups are described that can be used as a tethering compound to immobilize an amine-containing material to a substrate. The first reactive functional group can be used to provide attachment to a surface of a substrate. The second reactive functional group is a N-sulfonyldicarboximide group that can be reacted with an amine-containing material, particularly a primary aliphatic amine, to form a connector group between the substrate and the amine-containing material. The invention also provides articles and methods for immobilizing amine-containing materials to a substrate.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: April 22, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, Moses M. David, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G. Moore, Rahul Shah
  • Patent number: 7351838
    Abstract: Compounds having two reactive functional groups are described that can be used as a tethering compound to immobilize an amine-containing material to a substrate. The first reactive functional group can be used to provide attachment to a surface of a substrate. The second reactive functional group is a N-sulfonyldicarboximide group that can be reacted with an amine-containing material, particularly a primary aliphatic amine, to form a connector group between the substrate and the amine-containing material. The invention also provides articles and methods for immobilizing amine-containing materials to a substrate.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: April 1, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, Moses M. David, Cary A. Kipke, Brinda B. Lakshmi, Charles M. Leir, George G. Moore, Rahul Shah
  • Patent number: 7342082
    Abstract: Soluble polymers and methods for the preparation thereof, wherein the polymers of the present invention have pendant acylsulfonamide amine-reactive groups that can be used for the capture of amine containing materials.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: March 11, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Karl E. Benson, G. Marco Bommarito, Albert I. Everaerts, Brinda B. Lakshmi, Charles M. Leir, George G. I. Moore, Lang N. Nguyen, Rahul Shah, Peter A. Stark