Patents by Inventor John W. Frankenfeld

John W. Frankenfeld 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).

  • Ashless benzotriazole-thiadiazol compounds as anti-oxidant, anti-wear and friction modifiers in lubricants and the lubricants containing such compounds
    Patent number: 5490946
    Abstract: Adducts of benzotriazole or substituted benzotriazole with formaldehyde or with thiadiazole or substituted thiadiazole are useful as ashless anti-wear/anti-friction/anti-oxidant additives for lubricants. Formulated lubricants containing such adducts exhibit compound levels of anti-wear, anti-friction and oxidation stability performance.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: February 13, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Morton Beltzer, Manuel A. Francisco, John W. Frankenfeld
  • Alkylamine substituted benzotriazole containing lubricants having improved oxidation stability and rust inhibition (PNE-530)
    Patent number: 5076946
    Abstract: The addition of certain alkylamine substituted benzotriazole compounds to a lubricant imparts improved oxidation stability and rust inhibition to the lubricant.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: December 31, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: John W. Frankenfeld, Keith U. Ingold
  • Aromatic substituted benzotriazole containing lubricants having improved oxidation stability
    Patent number: 4997585
    Abstract: The addition of certain aromatic substituted benzotriazole compounds to a lubricant imparts improved oxidation stability to the lubricant. The oxidation stability is particularly enhanced when the substituents on the substituted aromatic ring are strong electron donors.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: March 5, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: John W. Frankenfeld, Alan R. Katritzky
  • Bis imidazole ethers as metal deactivators
    Patent number: 4869838
    Abstract: Bis imidazole ethers have been found to be effective metal deactivators. Thus, one aspect of the present invention comprises novel bis imidazole ethers of the formula: ##STR1## in which R is a normal alkyl group having from 1 to 12 carbon atoms and R' is a normal alkyl group having from 1 to carbon atoms, an alkylaryl group having from 7 to 20 carbon atoms, or an aryl group of 6 to 10 carbon atoms. In another aspect of the present invention, an improved lubricating oil is provided comprising a base lubricating oil and the bis imidazole ethers of this invention.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: September 26, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Sergiu M. Gorun, John W. Frankenfeld
  • Pour depressant
    Patent number: 4634550
    Abstract: A pour depressant for hydrocarbon oils, such as hydrotreated shale oil, and a method for depressing the pour point of hydrocarbon oil utilizing the pour depressant are disclosed. The depressant comprises the combination of:I. an asphaltenic material with copolymers of:II. dibehenyl fumarate vinyl acetate; and,III. ditallow fumarate vinyl acetate.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: January 6, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: Nicholas Feldman, John W. Frankenfeld
  • Method for improving the stability of shale oil
    Patent number: 4532027
    Abstract: A method for improving the storage stability of shale oil liquids by extracting or contacting the shale oil with a base solution having a pH of at least about 7.5 to inhibit the formation or reduce the level of sediment and gum which can form in said shale oil.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: July 30, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: John W. Frankenfeld, Robert L. Bruncati
  • Aliphatic diols as preservatives for cosmetics and related products
    Patent number: 3970759
    Abstract: Cosmetics and personal care products are protected from spoilage due to microbial attack by the addition of certain poly alcohols and their esters, such as 1,3-diols and the mono- or diesters of such diols.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: July 20, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: John W. Frankenfeld, Donald L. Wright