Patents by Inventor Lois F. Duerst

Lois F. Duerst 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).

  • Dental restoration molds
    Patent number: 11801126
    Abstract: In some examples, a tool for forming a dental restoration comprises a preformed mold body configured to provide a patient-specific, customized fit with at least one tooth to be restored of a patient. The mold body is configured to align with a portion of a surface of the at least one tooth, and is configured to combine with the at least one tooth to define a mold cavity encompassing at least a portion of desired tooth structure of the at least one tooth to be restored of the patient. The portion of desired tooth structure defines a transition from a supragingival surface of the at least one tooth to a subgingival surface of the at least one tooth.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: October 31, 2023
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: James D. Hansen, Katelyn M. Languell, Joseph C. Dingeldein, Lois F. Duerst
  • DENTAL RESTORATION MOLDS
    Publication number: 20190083208
    Abstract: In some examples, a tool for forming a dental restoration comprises a preformed mold body configured to provide a patient-specific, customized fit with at least one tooth to be restored of a patient. The mold body is configured to align with a portion of a surface of the at least one tooth, and is configured to combine with the at least one tooth to define a mold cavity encompassing at least a portion of desired tooth structure of the at least one tooth to be restored of the patient. The portion of desired tooth structure defines a transition from a supragingival surface of the at least one tooth to a subgingival surface of the at least one tooth.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Inventors: James D. Hansen, Katelyn M. Languell, Joseph C. Dingeldein, Lois F. Duerst
  • Holder for multiple dental composite shade guides
    Patent number: D898223
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: October 6, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Fusu Thao, Philip N. Stankard, Michael J. Vostal, Lois F. Duerst, Dylan R. Johnson
  • Container for a dental composite shade guide kit
    Patent number: D907241
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: January 5, 2021
    Assignee: 3M Innovative Properties Company
    Inventors: Fusu Thao, Philip N. Stankard, Michael J. Vostal, Lois F. Duerst, Dylan R. Johnson
  • Dental composite shade guide
    Patent number: D925042
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: July 13, 2021
    Assignee: 3M Innovative Properties Company
    Inventors: Fusu Thao, Philip N. Stankard, Michael J. Vostal, Lois F. Duerst, Dylan R. Johnson