Patents by Inventor Marvin M. Crutchfield

Marvin M. Crutchfield 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: 5183473
    Abstract: A novel bleach composition is disclosed comprising a sulfatase enzyme and a peroxydisulfate which composition, in aqueous solution, generates the more reactive peroxymonsulfate bleach compound. Detergent compositions and bleach processes are also disclosed wherein the peroxymonsulfate is produced in situ to provide bleach functions with greatly reduced dye damage, particularly useful to remove blood stains from textile materials.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: February 2, 1993
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Bertie J. Reuben
  • Patent number: 4959496
    Abstract: There is disclosed herein improved processes for the preparation of ether carboxylates by reacting in an alkaline reaction medium the salts of maleic acid and a carboxylic or polycarboxylic acid having a reactive hydroxyl group on a non-carbonyl carbon atom in the presence of a calcium ion catalyst wherein unreacted acid salts are recovered from the reaction medium by lowering the pH of the reaction medium to a range of from about 4 to about 6. The precipitated salts are recycled to the synthesis reaction to prepare additional amounts of product.
    Type: Grant
    Filed: August 24, 1988
    Date of Patent: September 25, 1990
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Liou-Liang Horng, Robert G. Schultz
  • Patent number: 4806205
    Abstract: Fibrous sheet composites are prepared by (a) forming an aqueous dispersion comprising asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium, and mixtures thereof, auxiliary fibers, and a water insoluble organic polymeric binder; (b) distributing and draining the aqueous dispersion on a porous substrate to form a wet sheet-like solid phase or wet web; and (c) pressing and drying the wet web.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: February 21, 1989
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, John A. Hinkebein
  • Patent number: 4609433
    Abstract: Sheet composites containing asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium, and mixtures thereof, are useful as a replacement or substitute for asbestos sheets in applications where fibrous materials are needed.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: September 2, 1986
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, John A. Hinkebein
  • Patent number: 4419258
    Abstract: Dialkyl glyoxylates useful as anionic surfactants are disclosed. The dialkyl glyoxylates are particularly effective in removing soils from fabrics under laundering conditions. Detergent compositions containing the dialkyl glyoxylates and detergency builders are disclosed.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: December 6, 1983
    Assignee: Monsanto Company
    Inventor: Marvin M. Crutchfield
  • Patent number: 4384969
    Abstract: Novel monoalkyl oxybisacetates are attractively useful as surfactants, and particularly in detergent compositions.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: May 24, 1983
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, James M. Mayer
  • Patent number: 4327189
    Abstract: Various clay substances, such as kaolin, can be reversibly deflocculated by treating the flocculant clay slurry with a deflocculating amount of a polymer having the general formula: ##STR1## wherein n averages at least 4; M is selected from the group consisting of alkali metals, ammonium, and alkanol amine groups having from 1 to about 4 carbon atoms; R.sup.1 and R.sup.2 are individually any chemically stable group which stabilizes the polymer against rapid depolymerization in alkaline solution. When the polymer depolymerizes, the clay slurry will reflocculate under agitated or quiescent conditions. The length of time that the slurry remains fluid depends on the pH, the concentration of the polymer, and the hydrolytic stability of the polymer.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: April 27, 1982
    Assignee: Monsanto Company
    Inventor: Marvin M. Crutchfield
  • Patent number: 4315092
    Abstract: A polyacetal carboxylate is provided having the following empirical formula: ##STR1## where M is selected from the group consisting of akali metal, ammonium, tetra-alkyl ammonium groups and alkanol ammonium groups, and n averages at least 4. Such polyacetal carboxylates can be used as complexing agents and detergency builders.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: February 9, 1982
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren
  • Patent number: 4303777
    Abstract: A polymer having the average structure: ##STR1## wherein Y is a moiety containing 1 to about 20 carbon atoms randomly distributed along the polymer chain derived from a comonomer selected from the group consisting of aldehydes and epoxy compounds; p is 0 or 1; the product of q and n averages at least 4; R.sup.1 and R.sup.2 are individually any chemically stable group which stabilizes the polymer against rapid depolymerization in alkaline solution; and Z is a mixture of H and members selected from the group consisting of alkali metals, ammonium and alkanol amine groups having from 1 to about 4 carbon atoms, is useful for the reversible deflocculation of clay slurries. In the preferred embodiments, p is 0 to provide a homopolymer, the product of q and n averages between about 10 and about 200, and Z is a mixture containing at least 1 percent H, the remainder being alkali metal, e.g., sodium.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: December 1, 1981
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, David R. Dyroff
  • Patent number: 4257906
    Abstract: The trialkali metal salts of nitrilotriacetate are well known detergent builders. However, when hypochlorite bleach is added to the wash water it can oxidize the soluble uncomplexed nitrilotriacetate with the resultant loss of the beneficial effects of the use of such salts as a builder. Now, a method has been developed of protecting the desirable builder properties of the trialkali metal nitrilotriacetate in an aqueous solution containing active chlorine which comprises adding to the nitrilotriacetate a sufficient amount of trialkali metal imidodisulfate to protect at least some of the nitrilotriacetate from damage by the chlorine.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: March 24, 1981
    Assignee: Monsanto Company
    Inventor: Marvin M. Crutchfield
  • Patent number: 4223162
    Abstract: Ether carboxylates represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are individually selected from the group consisting of alkyl containing up to 20 carbon atoms, and M.sup.1, M.sup.2 and M.sup.3 are individually selected from the group consisting of alkyl containing up to about 4 carbon atoms, are useful as intermediates to prepare the corresponding acid or alkali metal, ammonium and alkanol amine salts, which are useful as chelants, sequestrants and detergent builders.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: September 16, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert, Charles J. Upton
  • Patent number: 4204052
    Abstract: Copolymers of acetal carboxylates are provided which have the following empirical formula ##STR1## where Y is one or more comonomers randomly distributed in the copolymer; the product of n and q averages at least 4; p is at least 1; and M is selected from the group consisting of alkali metal, ammonium, alkyl groups having 1 to about 4 carbon atoms, and alkanol ammonium groups having 1 to about 4 carbon atoms in the alkyl chain. Such copolymers are useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations. The copolymers are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: May 20, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren
  • Patent number: 4201858
    Abstract: Ether and acetal carboxylates useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations are known to the art. Certain polymeric polycarboxylates are also known to the art but all of these products suffer from either having poor builder properties or they are not readily biodegradable. According to the present invention, a method is provided for preparing new and novel polymeric acetal carboxylates which are stable under laundry use conditions, but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: May 6, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Charles J. Upton
  • Patent number: 4201687
    Abstract: A fabric bleaching composition is provided which consists essentially of water and a bleach selected from the group consisting of disodium chloroimidodisulfate, dipotassium chloroimidodisulfate and mixtures thereof. The fabric bleaching composition can also contain a detergent, a buffering agent and other ingredients in a detergent formulation. The fabric bleaching composition is intermediate in strength between peroxide-type fabric bleaches and alkali metal hypochlorite fabric bleaches.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: May 6, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Robert P. Langguth, James M. Mayer
  • Patent number: 4182900
    Abstract: Ether carboxylates represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of alkyl containing up to 20 carbon atoms and M.sub.1 and M.sub.2 are individually selected from the group consisting of alkyl containing up to about 4 carbon atoms, are useful as intermediates to prepare the corresponding acid or alkali metal, ammonium and alkanol amine salts, which are useful as chelants, sequestrants and detergent builders.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: January 8, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Victor D. Papanu, Charles J. Upton
  • Patent number: 4182718
    Abstract: The disclosure relates to:(a) 1,3-dioxolane and 1,3-dioxane polycarboxylates and their precursors having the general formula: ##STR1## wherein X may be selected from the group consisting of H, CCl.sub.3, CO.sub.2 R, where R is H or lower alkyl, CO.sub.2 M, where M is alkali metal, preferably Na, NH.sub.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: January 8, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Charles J. Upton
  • Patent number: 4172208
    Abstract: The compound of the formula: ##STR1## is useful as an intermediate to prepare a compound having the generic formula ##STR2## wherein X is selected from groups to provide tetrahydropyran type compounds, 1,4 dioxane type compounds or tetrahydrofuran type compounds, and R is selected from the group consisting of alkali metal, NH.sub.4.sup.+, NH(CH.sub.2 CH.sub.2 OH).sub.3.sup.+, and lower alkyl, branched or straight chain, with up to about C.sub.20 in the chain, useful as a detergent builder.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: October 23, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4158635
    Abstract: This disclosure concerns:(a) compounds having the molecular structure represented by the formula ##STR1## wherein M is 0 or CY.sub.2, where Y is H or lower alkyl (C.sub.1 to C.sub.4), X is selected from the group consisting of H, lower alkyl (C.sub.1 to C.sub.4), or COOZ, Z represents H, R or a salt forming ion from the group alkali metal, ammonium, or trialkanolammonium, and R is an alkyl group (branched or straight chain) having up to about C.sub.20 in the chain(b) a process for producing the compounds of (a) by the basic carboxylation of compounds represented by the formula ##STR2## wherein M, X and R are as described in (a), (C) SOLID AND LIQUID DETERGENT COMPOSITIONS COMPRISING COMPOUNDS OF (A) AND(d) washing processes employing the compounds of (a) and/or the compositions of (c).
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: June 19, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Charles J. Upton
  • Patent number: 4156687
    Abstract: A compound of the formula ##STR1## wherein R' is lower alkyl is useful as an intermediate to prepare a compound of the formula ##STR2## wherein X is selected from the group consisting of: ##STR3## wherein R is selected from the group consisting of alkali metal, NH.sub.4.sup.+, NH(CH.sub.2 CH.sub.2 OH).sub.3.sup.+, and lower alkyl, branched or straight chain, with up to about C.sub.20 in the chain. The esters can be converted to salts useful as detergent builders.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: May 29, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4150069
    Abstract: Compounds of the following formula: ##STR1## wherein R is selected from the group consisting of hydrogen and an alkyl group containing from 1 to 4 carbon atoms,R' is selected from the group consisting of --OB and halogen,B is alkali metal, ammonium or trialkanolammonium, andM is selected from B or alkyl having up to 20 carbon atoms,Are provided. The salts are useful as detergent builders, and the esters are useful intermediates to make the salts.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: April 17, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, John N. Rapko