Patents by Inventor Narender Pal Luthra

Narender Pal Luthra 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).

  • Controlled release supplemental coolant additive
    Patent number: 6010639
    Abstract: A controlled-release supplement coolant additive for use in diesel engine coolant systems comprising a core containing at least one supplemental coolant additive (SCA) active component and a polymeric coating material encapsulating said core. The controlled released supplement coolant additive slowly releases the SCA active components to a diesel engine coolant system, thereby delivering an effective concentration level of SCA active components over an extended period. The controlled-release supplement coolant additive maintains a minimum concentration level of active SCA components in the coolant system. Additionally, the controlled-release supplemental coolant additive prevents overdosing the coolant system with particular SCA active components such as nitrates.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: January 4, 2000
    Assignee: BetzDearborn Inc.
    Inventors: Wayne A. Mitchell, Kurt D. Heinz, Clifford Alvin Ferrin, Jr., Narender Pal Luthra
  • Controlled release supplemental coolant additive
    Patent number: 5741433
    Abstract: A controlled-release supplement coolant additive for use in diesel engine coolant systems comprising a core containing at least one supplemental coolant additive (SCA) active component and a polymeric coating material encapsulating said core. The controlled released supplement coolant additive slowly releases the SCA active components to a diesel engine coolant system, thereby delivering an effective concentration level of SCA active components over an extended period. The controlled-release supplement coolant additive maintains a minimum concentration level of active SCA components in the coolant system. Additionally, the controlled-release supplemental coolant additive prevents overdosing the coolant system with particular SCA active components such as nitrates.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: April 21, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Wayne A. Mitchell, Kurt D. Heinz, Clifford Alvin Ferrin, Jr., Narender Pal Luthra
  • Timed release of water-soluble plant nutrients
    Patent number: 5652196
    Abstract: Products for the variable controlled release of water soluble agents are disclosed. The products have a core of water soluble agent and a first and second coating. The first coating has a permeability such that the agent can be released at a controlled rate, while the second coating has a relatively low water vapor transmission rate. Variation in the coating thicknesses and coating conditions result in nutrient release profiles which can be tailored to specific plant requirements. After application of the product, release of the agent is negligible, but after a predetermined time, e.g. one month or more, substantial release of the agent from the coated product begins. The product is particularly suitable for delayed, controlled release fertilizers.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: July 29, 1997
    Assignee: OMS Investments, Inc.
    Inventors: Narender Pal Luthra, Darwin Scott Bull, Garrard Lee Hargrove