Patents by Inventor Roberta L. Farrell

Roberta L. Farrell 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).

  • Use of rLDM.TM. 1-6 and other ligninolytic enzymes in the treatment of mechanical pulps
    Patent number: 4687745
    Abstract: Disclosed is a novel process for enhancing the strength properties and brightness stability of mechanical pulps. The process uses novel enzymes called rLDM.TM. and other ligninolytic enzymes present in the extracellular growth medium of a fermentation of Phanerochaete chrysosporium.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: August 18, 1987
    Assignee: Repligen Corporation
    Inventor: Roberta L. Farrell
  • Novel enzymes which catalyze the degradation and modification of lignin
    Patent number: 4687741
    Abstract: Novel lignin-degrading enzymes designated rLDM.TM.1, rLDM.TM.2, rLDM.TM.3, rLDM.TM.4, rLDM.TM.5, and rLDM.TM.6 are isolated and purified to the essentially pure form, wherein each rLDM.TM. is substantially free of other rLDM.TM. and native proteins, from the extracellular medium of a novel mutant microbe. The novel mutant, designated SC26, produces large amounts of the rLDM.TM., thus facilitating the isolation and purification of them. These rLDM.TM. are useful in pulping processes to degrade and/or modify lignin.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: August 18, 1987
    Assignees: Repligen Corporation, The United States of America as represented by the Secretary of Agriculture
    Inventors: Roberta L. Farrell, Thomas K. Kirk, Ming Tien