Patents by Inventor Richard Koser

Richard Koser 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).

  • Automatic refrigerant recovery, purification and recharge apparatus
    Patent number: 4285206
    Abstract: Automatic recovery and purification of refrigerant from air-conditioners about to be discarded or repaired is provided for. In addition, the reclaimed refrigerant with or without fresh refrigerant can be recharged to air-conditioning systems. The apparatus is particularly useful in connection with automatic reclaim and recharge of vehicular air-conditioners where the operation is to carried out at a service station at low cost by semi-skilled operators.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: August 25, 1981
    Assignee: Draf Tool Co., Inc.
    Inventor: Richard Koser