Patents by Inventor David A. Heider

David A. Heider 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: 20220275021
    Abstract: Systems and processes for performing solid phase peptide synthesis are generally described. Solid phase peptide synthesis is a known process in which amino acid residues are added to peptides that have been immobilized on a solid support. In certain embodiments, the inventive systems and methods can be used to perform solid phase peptide synthesis quickly while maintaining high yields. Certain embodiments relate to processes and systems that may be used to heat, transport, and/or mix reagents in ways that reduce the amount of time required to perform solid phase peptide synthesis.
    Type: Application
    Filed: December 21, 2021
    Publication date: September 1, 2022
    Applicant: Massachusetts Institute of Technology
    Inventors: Mark David Simon, Bradley L. Pentelute, Andrea Adamo, Patrick Louis Heider, Klavs F. Jensen
  • Patent number: 4883021
    Abstract: An absorbent composition is disclosed which is particularly useful as an improved animal or pet litter composition, or as an absorbent for aqueous systems or oleophilic materials such as petroleum or vegetable oils and the like. Also disclosed is a method of making the improved absorbent composition and litter composition containing the same. The absorbent compositions include a nitrogen compound absorber such as cyclodextrin or other agents which form a matrix system or complex similar to cyclodextrin. Such other agents include polymerized cyclodextrin and cyclodextrin derivatives and polycarboxylic acid polymers such as acrylate polymers.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: November 28, 1989
    Assignee: Personal Pet Products Partnership
    Inventors: Cyril L. Ducharme, Ralph C. Eickhof, David A. Heider, Denny W. Neiberger, Fred Maass
  • Patent number: 4881490
    Abstract: An absorbent composition is disclosed which is particularly useful as an improved animal or pet litter composition, or as an absorbent for aqueous systems or oleophilic materials such as petroleum or vegetable oils and the like. Also disclosed is a method of making the improved absorbent composition and litter composition containing same. The absorbent composition is comprised of clay and a nitrogenous compound absorber, such as cyclodextrin or other agents which form a matrix system or complex similar to cyclodextrin. Such other agents include polymerized cyclodextrin and cyclodextrin derivatives and polycarboxylic acid polymers such as a acrylate polymers.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: November 21, 1989
    Inventors: Cyril L. Ducharme, Ralph C. Eickhof, David A. Heider, Denny W. Neiberger, Fred Maass
  • Patent number: 4844010
    Abstract: An absorbent composition is disclosed which is particularly useful as an improved animal or pet litter composition, or as an absorbent for aqueous systems or oleophilic materials such as petroleum or vegetable oils and the like. Also disclosed is a method of making the improved absorbent composition and litter composition containing same. The absorbent composition is comprised of clay and cylodextrin as a nitrogenous compound absorber.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: July 4, 1989
    Assignee: Personal Pet Products Partnershhip
    Inventors: Cyril L. Ducharme, Ralph C. Eickhof, David A. Heider, Denny W. Neiberger, Fred Maass
  • Patent number: 4727824
    Abstract: An absorbent composition is disclosed which is particularly useful as an improved animal or pet litter composition, or as an absorbent for aqueous systems or oleophilic materials such as petroleum or vegetable oils and the like. Also disclosed is a method of making the improved absorbent composition and litter composition containing same.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: March 1, 1988
    Assignee: Personal Pet Products Partnership
    Inventors: Cyril L. Ducharme, Ralph C. Eickhof, David A. Heider, Denny W. Neiberger, Fred Maass