Patents by Inventor Sumanth Addagarla

Sumanth Addagarla 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).

  • Low sulfur lubricant composition for two-stroke engines
    Patent number: 6391833
    Abstract: A low sulfur detergency additive suitable for lubricant composition used in air-cooled two-stroke cycle engines having an unsulfurized alkaline earth alkylsalicylate and optionally a molybdenum compound.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: May 21, 2002
    Assignee: Chevron Chemical S.A.
    Inventors: Frank Ilmain, Sumanth Addagarla, Jacques Cazin
  • LOW SULFUR LUBRICANT COMPOSITION FOR TWO-STROKE ENGINES
    Publication number: 20020055444
    Abstract: A low sulfur detergency additive suitable for lubricant composition used in air-cooled two-stroke cycle engines having an unsulfurized alkaline earth alkylsalicylate and optionally a molybdenum compound.
    Type: Application
    Filed: April 21, 1999
    Publication date: May 9, 2002
    Inventors: FRANK ILMAIN, SUMANTH ADDAGARLA, JACQUES CAZIN
  • Lubricant composition suitable for direct fuel injected, crankcase-scavenged two-stroke cycle engines
    Patent number: 6040279
    Abstract: A lubricant composition is disclosed that is suitable for direct fuel injected, crankcase-scavenged two-stroke cycle engines. That lubricant composition has a major amount of at least one oil of lubricating viscosity, a minor amount of a lubricity additive, a polyalkyl amide, an imidazoline, a polyisobutylene, and a functionalized polyisobutylene. The lubricity additive contains glycerol monooleate, an acid aliphatic aromatic amine-phosphate, and sodium sulfonate. The acid aliphatic aromatic amine-phosphate has a phosphorus/oxygen atom ratio of from 4.0:1 to 4.5:1, and at least 1.2 equivalents of acid to 1.0 equivalents of base.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: March 21, 2000
    Assignee: Chevron Chemical Company LLC
    Inventors: Sumanth Addagarla, Glenn E. Callis
  • Lubricant composition suitable for direct fuel injected, crankcase-scavenged two-stroke cycle engines
    Patent number: 5866520
    Abstract: A lubricant composition is disclosed that is suitable for direct fuel injected, crankcase-scavenged two-stroke cycle engines. That lubricant composition has a major amount of at least one oil of lubricating viscosity, a minor amount of a lubricity additive, a polyalkyl amide, an imidazoline, a polyisobutylene, and a functionalized polyisobutylene. The lubricity additive contains glycerol monooleate, an acid aliphatic aromatic amine-phosphate, and sodium sulfonate. The acid aliphatic aromatic amine-phosphate has a phosphorus/oxygen atom ratio of from 4.0:1 to 4.5:1, and at least 1.2 equivalents of acid to 1.0 equivalents of base.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: February 2, 1999
    Assignee: Chevron Chemical Company
    Inventors: Sumanth Addagarla, Glenn E. Callis