Patents by Inventor Pallassana Ramachandran

Pallassana Ramachandran 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: 5610194
    Abstract: Insect repellent compositions are provided comprising mixtures of:(a) from about 5 to about 95%, by weight, of an N-alkyl neoalkanamide having the formula: ##STR1## wherein R.sub.1 R.sub.2, and R.sub.3 are alkyl groups and the sum of the carbon atoms therein is from 6 to 12, and wherein R.sub.4 is either a hydrogen atom or an alkyl group having one to two carbon atoms, and wherein R.sub.5 is methyl, ethyl, or propyl; and(b) from about 5 to about 95%, by weight, of N,N-diethyl-meta-toluamide (DEET).Preferred repellent composition comprise mixtures of N-methyl neodecanamide (MNDA) and DEET which provide synergistic repellency effects against a variety of insects including cockroaches, silverfish, mosquitoes, flies and ants. The repellent compositions may be applied directly to surfaces to be treated or they may be incorporated in detergent compositions such as laundry detergents, floor and wall cleaners, rug cleaners and shampoos, hair shampoos and liquid and bar soaps.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: March 11, 1997
    Assignee: Colgate-Palmolive Company
    Inventors: Thomas G. Polefka, Pallassana Ramachandran, Robert J. Steltenkamp, Thomas F. Connors, Kevin M. Kinscherf
  • Patent number: 4842769
    Abstract: A stabilized enzyme-containing built liquid detergent is provided comprising(a) from about 5 to 20%, by weight, of one or more surface active detergent compounds selected from the group consisting of anionic, nonionic and amphoteric detergent compounds;from about 5 to 30%, by weight, of one or more builder salts selected from the group consisting of alkali metal tripolyphosphates, alkali metal carbonates, alkali metal nitrilotriacetates and polyacetal carboxylates;(c) from about 5 to 20%, by weight, of a swelling bentonite clay;(d) an effective amount of an enzyme or an enzyme mixture selected from the group consisting of alkaline protease enzymes and alpha-amylase enzymes;(e) an enzyme-stabilizing system containing, based on the weight of the detergent composition, (i) from about 1% to 10% glycerine; (ii) from about 1 to 8% of a boron compound selected from the group consisting of boric acid, boric oxide and alkali metal borates; and (iii) from about 0.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: June 27, 1989
    Assignee: Colgate-Palmolive Co.
    Inventors: Jan E. Shulman, Pallassana Ramachandran
  • Patent number: 4787110
    Abstract: Detergent laundry bars of improved foaming properties during hand washing of laundry are described which include 15 to 45% of a mixture of 0.05 to 20 parts of sodium higher fatty alcohol sulfate and 1 part of sodium alpha-sulfo-higher fatty acid lower alkyl ester, 10 to 60% of a builder for the detergent mixture, a bodying proportion, in the range of 20 to 70%, of water insoluble powder and/or sodium sulfate filler, and 5 to 22% of water (including that which is removable from any hydrate components when the bar is subjected to heating at 105.degree. C. for two hours). Preferably the invented bars will comprise 5 to 20% of sodium coco alcohol sulfate, 10 to 20% of sodium alpha-sulfo-higher fatty acid methyl ester, 8 to 20% of sodium tripolyphosphate, 5 to 15% of sodium carbonate, 1 to 6% of sodium silicate, 20 to 35% of calcium carbonate powder, 0 to 15% of talc and 7 to 11% of water.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: November 29, 1988
    Assignee: Colgate-Palmolive Company
    Inventors: Patrizia Barone, Pallassana Ramachandran
  • Patent number: 4539135
    Abstract: A particulate laundry detergent composition is provided comprising:(a) from about 0.1 to about 50%, by weight, of a perfume-containing carrier comprising (i) discrete particles containing at least 75%, by weight, of a clay mineral other than talc and/or a zeolite, and less than about 5%, by weight, of surface active detergent compounds; and (ii) a perfume, said perfume being adsorbed and/or absorbed on said particles; and(b) from about 2 to about 50%, by weight, additional to any detergent compound in said particles, of one or more surface active detergent compounds selected from the group consisting of anionic, nonionic, cationic, ampholytic and zwitterionic detergent compounds. The balance of the composition is comprised of water and optionally builder and filler salts.
    Type: Grant
    Filed: June 1, 1983
    Date of Patent: September 3, 1985
    Assignee: Colgate Palmolive Co.
    Inventors: Pallassana Ramachandran, Paul S. Grand
  • Patent number: 4140641
    Abstract: A highly concentrated single phase liquid detergent composition containing fabric softener is formulated from a nonionic surfactant and an imidazolinium quaternary ammonium fabric softener.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: February 20, 1979
    Assignee: Colgate-Palmolive Company
    Inventor: Pallassana Ramachandran
  • Patent number: 4073735
    Abstract: A rinse cycle fabric softening composition effective in reducing fabric discoloration consisting essentially of a cationic softening agent, preferably a quaternary ammonium softener, and an alkali metal silicate in the weight ratio of 4:3 to 4:1 of cationic:silicate.
    Type: Grant
    Filed: February 19, 1976
    Date of Patent: February 14, 1978
    Assignee: Colgate Palmolive Company
    Inventor: Pallassana Ramachandran
  • Patent number: 4045358
    Abstract: A non-yellowing fabric softening composition having improved whitening properties comprising a cationic softener, preferably a quaternary ammonium softener, and a perphthalic acid in the weight ratio of 4:1 to 1:1 of cationic:perphthalic acid.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: August 30, 1977
    Assignee: Colgate Palmolive Company
    Inventor: Pallassana Ramachandran
  • Patent number: 3954630
    Abstract: A fabric treating composition for use in preventing the staining of fabrics consisting essentially of an aqueous solution of a complexing acid and a cationic fabric softening agent, the complexing acid and the softening agent being present in amounts so that on dilution with water the complexing acid comprises from 0.01 to 0.1% by weight of the dilution and the softening agent comprises from 0 to 0.1% of the dilution.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: May 4, 1976
    Assignee: Colgate-Palmolive Company
    Inventor: Pallassana Ramachandran