Patents by Inventor David Durden

David Durden 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: 20230324159
    Abstract: A munition with redundant safety features to return the munition to a safe, unarmed state, the munition includes an encasement, an energetic within the encasement, an electronic initiator configured to initiate a detonation of the energetic, wherein the electronic initiator is configured to be discharged to prevent detonation of the energetic, and a mechanical safety assembly configured to be selectively moved from an unarmed position to an armed position, wherein in the armed position the mechanical safety assembly provides a physical barrier between the energetic and the electronic initiator to prevent detonation of the energetic, wherein in the armed position in the mechanical safety assembly provides a pathway between the energetic and the electronic initiator.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 12, 2023
    Inventors: David Durden, Samuel Giles
  • Patent number: 6984754
    Abstract: Novel compounds of formula (I) are described wherein: R1=(CH2)mCH3 where m is 0 or an integer in the range from 1 to 16, or an alkenyl, alkynyl, alkoxy, alkylthio, or alkyl sulfinyl group having from 2 to 17 carbon atoms; R2=H, CH3 or CH2CH3; R3=H or CH3; R4H or CH3; R5=lower alkyl having from 1 to 5 carbon atoms; n is an integer in the range from 1 to 3, and X is carboxyl (COOH) or carbalkoxy (COOR5), cyano (C?N), phosphonic acid (PO3H2), phosphonate ester (PO3[R5]2) or 5-tetrazole, and pharmaceutically acceptable salts thereof. Preferably, the compounds are optically pure enantiomers of the R— or S—configuration in which R3=R4=R5=H, R2=CH3 and R1 is a saturated aliphatic chain of one to five carbon atoms.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: January 10, 2006
    Assignee: University of Saskatchewan Technologies Inc.
    Inventors: Lillian E. Dyck, Bruce A. Davis, Ya-Dong Liu, David A. Durden, Alan A. Boulton, Brenda Kennedy, Kevin Rogers, I. Alick Paterson
  • Publication number: 20050159393
    Abstract: Novel compounds of the formula I are described: wherein: R1=(CH2)mCH3 where m is 0 or an integer in the range from 1 to 16, or an alkenyl, alkynyl, alkoxy, alkylthio, or alkyl sulfinyl group having from 2 to 17 carbon atoms, R2=H, CH3 or CH2CH3 R3=H or CH3 R4=H or CH3 R5=lower alkyl having from 1 to 5 carbon atoms n is an integer in the range from 1 to 3, and X is carboxyl (COOH) or carbalkoxy (COOR5), cyano (C?N), phosphonic acid (PO3H2), phosphonate ester (PO3[R5]2) or 5-tetrazole, and pharmaceutically acceptable salts thereof. Preferably, the compounds are optically pure enantiomers of the R- or S-configuration in which R3=R4=R5=H, R2=CH3 and R1 is a saturated aliphatic chain of one to five carbon atoms. The compounds are useful as cellular rescue agents.
    Type: Application
    Filed: March 11, 2005
    Publication date: July 21, 2005
    Applicant: University of Saskatchewan Technologies Inc.
    Inventors: Lillian Dyck, Bruce Davis, Ya-Dong Liu, David Durden, Alan Boulton, I. Paterson, Brenda Kennedy, Kevin Rogers
  • Patent number: 6251950
    Abstract: The present invention relates to the use of a group of propargylamines of the general formula (I) wherein R1 is hydrogen or CH3 and R2 is (CH2)nCH3 and n is an integer from 0 to 16, and salts thereof, as cellular rescue agents in the treatment and prevention of diseases in which cell death occurs by apoptosis. Some of the compounds of formula I are novel. The invention is also directed to the use of these compounds in the treatment of these diseases, as well as to processes for the preparation of the compounds.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: June 26, 2001
    Assignee: University of Saskatchewan
    Inventors: David Durden, Alick Paterson, Bruce Davis, Lillian Dyck, Peter Yu, Xinmin Li, Alan Boulton
  • Patent number: 5840979
    Abstract: The present invention relates to the use of a group of propargylamines of the general formula (I) ##STR1## wherein R.sup.1 is hydrogen or CH.sub.3 and R.sup.2 is (CH.sub.2).sub.n CH.sub.3 and n is an integer from 0 to 16, and salts thereof, as cellular rescue agents in the treatment and prevention of diseases in which cell death occurs by apoptosis. Some of the compounds of formula I are novel. The invention is also directed to the use of these compounds in the treatment of these diseases, as well as to processes for the preparation of the compounds.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: November 24, 1998
    Assignee: University of Saskatchewan
    Inventors: David Durden, Alick Paterson, Bruce Davis, Lillian Dyck, Peter Yu, Xinmin Li, Alan Boulton