Patents by Inventor Malcolm John Smith

Malcolm John Smith 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).

  • Treatment of aqueous systems
    Patent number: 4046707
    Abstract: A method of inhibiting the precipitation of scale-forming salts of calcium, magnesium, barium and strontium from aqueous systems comprising adding to the aqueous system a telomeric compound of the formula: ##STR1## or salts thereof, wherein R.sup.11 is hydrogen, methyl or ethyl, R is hydrogen, 1-18C alkyl, 5-12C cycloalkyl, aryl, aralkyl, a residue of formula: ##STR2## wherein R.sup.11 has its previous significance and the sum of n + m is an integer of at most 100, or a residue --OX wherein X is hydrogen or 1-4C alkyl, and R.sup.1 is a residue --OX wherein X has its previous significance.
    Type: Grant
    Filed: May 29, 1975
    Date of Patent: September 6, 1977
    Assignee: Ciba Geigy (UK) Limited
    Inventors: Malcolm John Smith, Peter Miles, Norman Richardson, Michael Anthony Finan
  • Hydroxyaryl-tetramethyl-piperidines
    Patent number: 4038280
    Abstract: New 4-(4'-hydroxyaryl)-2,2,6,6-tetramethyl-piperidines are used as stabilisers for organic materials, especially for polymers.
    Type: Grant
    Filed: November 28, 1972
    Date of Patent: July 26, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Donald Richard Randell, Malcolm John Smith
  • 4-(4'-Hydroxycyclohexyl)-2,2,6,6-tetramethyl piperidines
    Patent number: 3954779
    Abstract: A compound having the formula:- ##SPC1##And salts thereof, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each is hydrogen, an alkyl residue having from 1 to 9 carbon atoms, a cycloalkyl residue having from 5 to 14 carbon atoms or a cycloalkyl-alkyl residue having from 7 to 14 carbon atoms, Y is hydrogen, 0.degree., an alkyl residue having from 1 to 4 carbon atoms, or an aralkyl residue having from 7 to 12 carbon atoms and Z is hydrogen, an unsubstituted or substituted alkyl residue having from 1 to 20 carbon atoms, an alkenyl or alkynyl residue having from 2 to 20 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aralkyl residue having from 7 to 12 carbon atoms, an aryl residue having from 6 to 12 carbon atoms, or the group having the formula: wherein Z.sub.1 has the same significance as Z as hereinbefore defined, or Z.sub.1 is a group --NR.sub.5 R.sub.6 wherein R.sub.5 is hydrogen or an alkyl residue having from 1 to 4 carbon atoms and R.sub.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: May 4, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Malcolm John Smith, Donald Richard Randell
  • Dehydro pyridinyl sulfides, sulfoxides and sulfones
    Patent number: 3939170
    Abstract: Compounds having the formula ##SPC1##Where X is S, SO or SO.sub.2 and Y and Y.sup.1 are the same or different and each is H, OH, O.sup.. or a straight- or branched alkyl residue having from 1 to 4 carbon atoms, and salts thereof when Y and Y.sup.1 are other than O.sup.. are useful as stabilisers for organic materials such as diene rubbers.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: February 17, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Donald Richard Randell, Malcolm John Smith