Patents by Inventor Robert L. Stewart

Robert L. Stewart 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: 4808086
    Abstract: Dryer-added fabric conditioning articles and methods utilizing a fabric softener agent and a polymeric soil release agent. More specifically, damp fabrics are commingled with softener active and polymeric soil release agent in an automatic soil release benefits concurrently with the drying operation. The softening and antistatic soil release agents herein are preferably employed in combination with a dispensing means adapted for use in an automatic dryer.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: February 28, 1989
    Assignee: The Procter & Gamble Company
    Inventors: Mark D. Evans, Gregory B. Huntington, Robert L. Stewart, Peter H. Wolf, Roger E. Zimmerer
  • Patent number: 4749596
    Abstract: Dryer-added fabric conditioning articles and methods utilizing a fabric softener agent and a polymeric soil release agent. More specifically, damp fabrics are commingled with softener active and polymeric soil release agent in an automatic clothes dryer and are provided with a soft, antistatic finish and soil release benefits concurrently with the drying operation. The softening and antistatic soil release agents herein are preferably employed in combination with a dispensing means adapted for use in an automatic dryer.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: June 7, 1988
    Assignee: The Procter & Gamble Company
    Inventors: Mark D. Evans, Gregory B. Huntington, Robert L. Stewart, Peter H. Wolf, Roger E. Zimmerer
  • Patent number: 4685909
    Abstract: Absorbent articles containing both pH control agents and substantially water-insoluble, highly neutralized hydrogel material as a fluid-absorbing polymer are disclosed. By placing pH control agents and hydrogel in distinct discrete zones within the article, absorbent products such as diapers can be realized which are highly effective for absorbing discharged body fluids and which also serve to prevent or reduce diaper rash.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: August 11, 1987
    Assignee: The Procter & Gamble Company
    Inventors: Ronald W. Berg, Robert L. Stewart
  • Patent number: 4497436
    Abstract: An insulating window shade assembly having a roll up shade which covers the window, seals about the shade to increase the effectiveness of the insulation provided by it, and venting means at the top and bottom of the shade assembly for allowing air to flow through the space between the shade and window to cool the space when the temperature exceeds a prescribed value.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: February 5, 1985
    Assignee: Appropriate Technology Corporation
    Inventors: Daniel L. Ingold, Robert L. Stewart
  • Patent number: 4451827
    Abstract: A communications network for providing full-duplex data transfer between any two network interface units on a one-to-all-others contention bus. Network interface units (NIUs) send and receive data signals on outgoing and incoming links, respectively, which are connected to junction boxes which couple the incoming link connected to one network interface unit to the outgoing links of only the other NIUs. The data signals have source address codes and destination address codes applied thereto, which codes are examined by each NIU receiving a data signal to determine (1) if the NIU will accept the data signal for processing and (2) if full duplex data transfer is occurring. Transmission of all data signals in the network is temporarily aborted when any two NIUs are transmitting data signals and at least the signal transmitted by one of the NIUs is not addressed to the other NIU.
    Type: Grant
    Filed: September 22, 1981
    Date of Patent: May 29, 1984
    Assignee: The Johns Hopkins University
    Inventors: Steven A. Kahn, Robert L. Stewart, Stephen G. Tolchin