Patents by Inventor Ralph R. Roberts

Ralph R. Roberts 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: 20020193396
    Abstract: Imidazoquinoline and tetrahydroimidazoquinoline compounds that contain ether and sulfonamide or sulfamide functionality at the 1-position are useful as immune response modifiers. The compounds and compositions of the invention can induce the biosynthesis of various cytokines and are useful in the treatment of a variety of conditions including viral diseases and neoplastic diseases.
    Type: Application
    Filed: December 1, 2001
    Publication date: December 19, 2002
    Inventors: Stephen L. Crooks, George W. Griesgraber, Philip D. Heppner, Bryon A. Merrill, Ralph R. Roberts, Ai-Ping Wei
  • Patent number: 6362379
    Abstract: A method is provided for preparation of chlorofluoroethers ClCF2CFClOR8f and Cl2CFCFClOR8f by direct fluorination of Cl2CHCH2OR8 and Cl3CCH2OR8, respectively, wherein R8 is a C1-C20 alkyl-or acyl-containing group optionally up to 5 ether oxygen atoms and optionally substituted by functional groups and R81, is the corresponding perfluoroalkyl or perfluoracyl-containing group.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: March 26, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: George G. I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
  • Patent number: 6313245
    Abstract: Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: November 6, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: George G. I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
  • Publication number: 20010037028
    Abstract: Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.
    Type: Application
    Filed: May 1, 2001
    Publication date: November 1, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: George G.I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
  • Patent number: 6288266
    Abstract: Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: September 11, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: George G. I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
  • Patent number: 6005137
    Abstract: Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: December 21, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: George G. I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
  • Patent number: 5994349
    Abstract: Phenothiazines of the formula: ##STR1## where R.sub.1 is H or --COOR, where R is selected from the group consisting of branched or unbranched alkyl groups containing from 1 to 4 carbon atoms, and where X is selected from H, branched or unbranched alkyl groups containing from 1 to 4 carbons, and halogen, and pharmaceutically acceptable salts thereof. Particularly preferred phenothiazines are those wherein X is hydrogen, chloro, bromo or methyl, R.sub.1 is COOR, and R is methyl, ethyl or t-butyl.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: November 30, 1999
    Assignee: Howard University
    Inventors: Kenneth R. Scott, Mia L. Laws, Ralph R. Roberts, Jesse M. Nicholson
  • Patent number: 5580894
    Abstract: An oxazolyl enaminone is provided having the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of a branched or unbranched alkyl groups containing from 1 to 4 carbon atoms and R.sub.2 is selected from the group consisting of a branched or unbranched alkyl group containing from 1 to 4 carbon atoms, a chloro group, a trifluoromethyl group and a trifluoromethoxy group. Also provided are pharmaceutically accepatable salts and isomers of the above, and pharmaceutical compositions containing the same.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 3, 1996
    Assignee: Howard University
    Inventors: Kenneth R. Scott, Ivan O. Edafiogho, Ralph R. Roberts
  • Patent number: 4297683
    Abstract: Vandalism and robbery of parking meters have become big problems. The unauthorized entry into the coin box area or striking of the housing as well as bending the support pipe makes it desirable to apprehend the robbers and/or vandals. Repair of the parking meter or support may be required due to such vandalism. A radio transmitter is adapted to send simultaneously two signals to a receiver which is constantly "on". The received signal indicates unauthorized entry or vandalism to a parking meter and to the particular parking meter from which the signal is sent. Switches are actuated at an opening of the timer compartment and/or coin box area. A switch is also actuated when the supporting post is bent. A timer is placed in this circuit so that only after a determined time interval is a signal sent of the bending of a post. On new installations a tensioned wire is placed in the pipe and is actuated when the pipe is cut or severely bent.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: October 27, 1981
    Inventor: Ralph R. Roberts