Patents by Inventor Rolando E. Gapud

Rolando E. Gapud 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).

  • Process for the enzymatic resolution of lactams
    Patent number: 6638758
    Abstract: A method of separating enantiomeric lactam esters. The lactam esters are contacted with a biocatalyst, such as an enzyme or a microorganism, in a solution wherein only one enantiomer is selectively hydrolyzed to give the optically active isomer of the corresponding acid. The hydrolysis product is then separated from the unreacted lactam esters. The enzyme is then recycled for reuse in the next enzymatic resolution. The undesired isomer is also racemized and reused in the next enzymatic resolution.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: October 28, 2003
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Mahima Trivedi, Rolando E. Gapud, John S. Ng, Alok K. Awasthi, Ping T. Wang
  • Hydroxyamidino derivatives useful as nitric oxide synthase inhibitors
    Patent number: 6576780
    Abstract: The current invention discloses hydroxyamidino derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: June 10, 2003
    Assignee: GD Searle & Company
    Inventors: Rolando E. Gapud, Timothy J. Hagen, E. Ann Hallinan, Donald W. Hansen, Jr., Barnett S. Pitzele, Suzanne S. Metz, R. Keith Webber, Foe S. Tjoeng, Robert E. Manning, Mihaly V. Toth
  • Imidazoles useful as nitric oxide synthase inhibitors
    Patent number: 6344473
    Abstract: 1,3-diazolino and 1,3-diazolidino heterocycle derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: February 5, 2002
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Arija A. Bergmanis, Timothy J. Hagen, E. Ann Hallinan, Steven W. Kramer, Suzanne Metz, Karen B. Peterson, Barnett S. Pitzele, Foe S. Tjoeng, Mihaly V. Toth, Mahima Trivedi, R. Keith Webber, Sofya Tsymbalov, Rolando E. Gapud
  • Process for the enzymatic resolution of lactams
    Publication number: 20010055798
    Abstract: A method of separating enantiomeric lactam esters. The lactam esters are contacted with a biocatalyst, such as an enzyme or a microorganism, in a solution wherein only one enantiomer is selectively hydrolyzed to give the optically active isomer of the corresponding acid. The hydrolysis product is then separated from the unreacted lactam esters. The enzyme is then recycled for reuse in the next enzymatic resolution. The undesired isomer is also racemized and reused in the next enzymatic resolution.
    Type: Application
    Filed: June 6, 2001
    Publication date: December 27, 2001
    Applicant: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Mahima Trivedi, Rolando E. Gapud, John S. Ng, Alok K. Awasthi, Ping T. Wang
  • Process for the enzymatic resolution of lactams
    Patent number: 6277626
    Abstract: A method of separating enantiomeric lactam esters. The lactam esters are contacted with a biocatalyst, such as an enzyme or a microorganism, in a solution wherein only one enantiomer is selectively hydrolyzed to give the optically active isomer of the corresponding acid. The hydrolysis product is then separated from the unreacted lactam esters. The enzyme is then recycled for reuse in the next enzymatic resolution. The undesired isomer is also racemized and reused in the next enzymatic resolution.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: August 21, 2001
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Mahima Trivedi, Rolando E. Gapud, John S. Ng, Alok K. Awasthi, Ping T. Wang
  • Hydroxyamidino derivatives useful as nitric oxide synthase inhibitors
    Patent number: 6207708
    Abstract: The current invention discloses hydroxyamidino derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: March 27, 2001
    Assignee: G. D. Searle & Company
    Inventors: Rolando E. Gapud, Timothy J. Hagen, E. Ann Hallinan, Donald W. Hansen, Jr., Barnett S. Pitzele, Suzanne S. Metz, R. Keith Webber, Foe S. Tjoeng, Robert E. Manning, Mihaly V. Toth
  • Oxathiadiazole derivatives usful as iNOS inhibitors
    Patent number: 6136829
    Abstract: 1,3-diazolino and 1,3-diazolidino heterocycle derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: October 24, 2000
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Ariia A. Bergmanis, Timothy J. Hagen, E. Ann Hallinan, Steven W. Kramer, Suzanne Metz, Karen B. Peterson, Barnett S. Pitzele, Foe S. Tjoeng, Mihaly V. Toth, Mahima Trivedi, R. Keith Webber, Sofya Tsymbalov, Rolando E. Gapud
  • 1,3-diazolino and 1,3-diazolidino heterocycles as useful nitric oxide synthase inhibitors
    Patent number: 5981556
    Abstract: 1,3-diazolino and 1,3-diazolidino heterocycle derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: November 9, 1999
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Arija A. Bergmanis, Timothy J. Hagen, E. Ann Hallinan, Steven W. Kramer, Suzanne Metz, Karen B. Peterson, Barnett S. Pitzele, Foe S. Tjoeng, Mihaly V. Toth, Mahima Trivedi, R. Keith Webber, Sofya Tsymbalov, Rolando E. Gapud
  • Hydroxyamidino derivatives useful as nitric oxide synthase inhibitors
    Patent number: 5981511
    Abstract: The current invention discloses hydroxyamidino derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: November 9, 1999
    Assignee: G.D. Searle & Co.
    Inventors: Rolando E. Gapud, Timothy J. Hagen, Ann E. Hallinan, Donald W. Hansen, Jr., Robert E. Manning, Suzanne Metz, Barnett S. Pitzele, Foe S. Tjoeng, Mihaly V. Toth, R. Keith Webber
  • 1,2,4-oxa diazolino and 1,24-oxa diazolidion heterocycles as useful nitric oxide synthase inhibitors
    Patent number: 5958958
    Abstract: 1,2,4-oxa-diazolino and 1,2,4-oxa-diazolidino heterocycle derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: September 28, 1999
    Assignee: G.D. Searle & Co.
    Inventors: Donald W. Hansen, Jr., Arija A. Bergmanis, Timothy J. Hagen, E. Ann Hallinan, Steven W. Kramer, Suzanne Metz, Karen B. Peterson, Barnett S. Pitzele, Foe S. Tjoeng, Mihaly V. Toth, Mahima Trivedi, R. Keith Webber, Sofya Tsymbalov, Rolando E. Gapud