Patents by Inventor Allan C. McRitchie

Allan C. McRitchie 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).

  • Patent number: 4454049
    Abstract: Liquid textile treatment compositions in the form of isotropic solutions comprising water-insoluble di-C.sub.16 -C.sub.24 optionally hydroxy-substituted alkyl, alkaryl or alkenyl cationic fabric softener, at least about 70% of the fabric softener consisting of one or more components together having a melting completion temperature of less than about 20.degree. C., a water-insoluble nonionic extender, especially C.sub.10 -C.sub.40 hydrocarbons or esters of mono- or polyhydric alcohols with C.sub.8 -C.sub.24 fatty acids, and a water-miscible organic solvent. The concentrates have improved formulation stability and dispersibility combined with excellent fabric softening characteristics.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: June 12, 1984
    Assignee: The Procter & Gamble Company
    Inventors: Neil A. MacGilp, Allan C. McRitchie, Barry T. Ingram, John Hampton
  • Patent number: 4375416
    Abstract: Laundry detergent compositions are provided which contain an effective textile softening agent which does not reduce their cleaning performance. The softening agent comprises a specified class of tertiary amines together with a smectite-type clay.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: March 1, 1983
    Assignee: The Procter & Gamble Company
    Inventors: Peter N. Crisp, Allan C. McRitchie, John G. Bell
  • Patent number: 4338204
    Abstract: A laundry detergent composition providing cleaning and softening of textiles comprises an anionic surfactant, a water-insoluble di C.sub.10 -C.sub.26 tertiary amine, and a water-soluble cationic compound which may be a mono C.sub.10 -C.sub.18 alkyl primary, secondary or tertiary amine, or a water-soluble salt thereof or a water-soluble mono C.sub.8 -C.sub.16 alkyl quaternary ammonium compound. A smectite clay serving as an additional textile softening agent and a detergent builder salt are preferred components of the granular form of the composition which may contain other conventional detergent ingredients.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: July 6, 1982
    Assignee: The Procter & Gamble Company
    Inventors: Gianfranco L. Spadini, Peter N. Crisp, Allan C. McRitchie
  • Patent number: 4333862
    Abstract: Liquid detergent compositions containing specific mixtures of selected anionic, nonionic and water-soluble cationic surfactants. The compositions are especially effective in removing greasy soil from fabrics.
    Type: Grant
    Filed: February 9, 1981
    Date of Patent: June 8, 1982
    Assignee: The Procter & Gamble Company
    Inventors: Rory J. M. Smith, Allan C. McRitchie
  • Patent number: 4321165
    Abstract: Built laundry detergent compositions containing specific mixtures of selected anionic, nonionic and water-soluble cationic surfactants. The compositions are especially effective in removing greasy soil from fabrics.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: March 23, 1982
    Assignee: The Procter & Gamble Company
    Inventors: Rory J. M. Smith, Allan C. McRitchie
  • Patent number: 4291071
    Abstract: Textile softening detergent compositions comprise a nonionic detergent, a cationic textile softener, a builder and a water-soluble polyphosphonic acid of the formula ##STR1## wherein n is 2 or more and Z is an organic group of effective covalency n, or a water-soluble salt thereof, and are preferably made by spray drying a mixture of the nonionic detergent and cationic softener on to spray dried carrier granules comprising at least part of the builders.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: September 22, 1981
    Assignee: The Procter & Gamble Company
    Inventors: Richard G. Harris, Allan C. McRitchie, Alexander D. Wilson
  • Patent number: 4220562
    Abstract: Additive products are provided for use in the washing of textiles comprising a mixture of an organic peroxy bleach precursor, a cationic surfactant and an alkoxylated nonionic surfactant of HLB 8-17 in water releasable combination with a non-particulate substrate, the additive products being adapted for addition to conventional inorganic persalt-containing detergent liquors to enhance the removal of bleachable and greasy stains.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: September 2, 1980
    Assignee: The Procter & Gamble Company
    Inventors: Gianfranco L. Spadini, Ian D. Tolliday, Allan C. McRitchie