Patents by Inventor Lloyd Royston Kelland

Lloyd Royston Kelland 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).

  • Therapeutic acridone and acridine compounds
    Patent number: 7300930
    Abstract: The present invention pertains to acridone and acridine compounds of formula (I), wherein either: (a) K is ?O, L is —H, alpha is a single bond, beta is a double bond, gamma is a single bond (acridones); or, (b) K is a 9-substituent, L is absent, alpha is a double bond, beta is a single bond, gamma is a double bond (acridines); and wherein: J1 is a 2- or 3-substituent; J2 is a 6- or 7-substituent; J1 and J2 are each independently a group of the formula —NHCO(CH2)nNR1R2, wherein: n is an integer from 1 to 5; and, R1 and R2 are independently hydrogen, C1-7alkyl, C3-20heterocyclyl, or C5-20aryl, or R1 and R2, taken together with the nitrogen atom to which they are attached, form a heterocyclic ring having from 3 to 8 ring atoms; and wherein, when K is a 9-substituent, K is a group of the formula —N(RN)Q, wherein: RN is an amino substituent and is hydrogen, C1-7alkyl, C3-20heterocyclyl, or C5-20aryl; and, Q is C1-7alkyl, C3-20heterocyclyl, or C5-20aryl, and is optionally substituted; and pharmaceutically acceptabl
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: November 27, 2007
    Assignee: Cancer Research Technology Limited
    Inventors: Stephen Neidle, Richard John Harrison, Lloyd Royston Kelland, Sharon Michele Gowan, Martin Anthony Read, Anthony Reszka
  • Therapeutic acridone and acridine compounds
    Patent number: 7205311
    Abstract: This invention pertains to certain acridone and acridine compounds of the formula which inhibit telomerase, regulate cell proliferation, etc., and/or treat cancer, proliferative conditions, etc.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: April 17, 2007
    Assignee: Cancer Research Technology Limited
    Inventors: Stephen Neidle, Richard John Harrison, Lloyd Royston Kelland, Sharon Michele Gowan, Martin Anthony Read, Anthony Reszka
  • Therapeutic acridone and acridine compounds
    Patent number: 7160896
    Abstract: The present invention pertains to acridone and acridine compounds of formula (I), wherein either: (a) K is ?O, L is —H, alpha single bond, beta is a double bond, gamma is a single bond (acridones); or, (b) K is a 9-substituent, L is absent, alpha is a double bond, beta is a single bond, gamma is a double bond (acridines); and wherein: J1 is a 2- or 3-substituent; J2 is a 6- or 7-substituent; J1 and J2 are each independently a group of the formula —NHCO(CH2)nNR1R2, wherein: n is an integer from 1 to 5; and, R1 and R2 are independently hydrogen, C1-7alkyl, C3-20heterocyclyl, or C5-20aryl, or R1 and R2, taken together with the nitrogen atom to which they are attached, form a heterocyclic ring having from 3 to 8 ring atoms; and wherein, when K is a 9-substituent, K is a group of the formula —N(RN)Q, wherein: RN is an amino substituent and is hydrogen, C1-7alkyl, C3-20heterocyclyl, or C5-20aryl; and, Q is C1-7alkyl, C3-20heterocyclyl, or C5-20aryl, and is optionally substituted; and pharmaceutically acceptable sal
    Type: Grant
    Filed: July 6, 2001
    Date of Patent: January 9, 2007
    Assignee: Cancer Research Technology Limited
    Inventors: Stephen Neidle, Richard John Harrison, Lloyd Royston Kelland, Sharon Michele Gowan, Martin Anthony Read, Anthony Reskza