Patents by Inventor John A. Worrell

John A. Worrell 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).

  • COMPOSITE ABRASIVE ARTICLE, AND METHOD OF MAKING AND USING THE SAME
    Publication number: 20230226664
    Abstract: A composite abrasive article comprises an open mesh backing member having first and second major surfaces and coated abrasive members secured to the first major surface. Independently, each coated abrasive member respectively comprises an abrasive layer comprising abrasive particles secured to a coated abrasive backing by at least one binder material. A method of making a composite abrasive article is also disclosed.
    Type: Application
    Filed: May 17, 2021
    Publication date: July 20, 2023
    Inventors: John A. Worrell, Schoen A. Schuknecht, Michael J. Annen
  • Retroreflective sheeting
    Patent number: 10618234
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 14, 2020
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • RETROREFLECTIVE SHEETING
    Publication number: 20180117863
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • Retroflective sheeting
    Patent number: 9878507
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: January 30, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • Retroreflective sheeting
    Patent number: 8783879
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: July 22, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • Retroreflective sheeting
    Patent number: 8371703
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: February 12, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • RETROREFLECTIVE SHEETING
    Publication number: 20110255165
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Application
    Filed: October 22, 2009
    Publication date: October 20, 2011
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad
  • RETROREFLECTIVE SHEETING
    Publication number: 20100103521
    Abstract: The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.
    Type: Application
    Filed: October 22, 2009
    Publication date: April 29, 2010
    Inventors: Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell, Sidney A. Ellingstad