Patents by Inventor Len W. Haleen

Len W. Haleen 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).

  • Aggressive convective drying in an agitated pan type dryer
    Patent number: 5746007
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to an agitated pan type dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: May 5, 1998
    Inventor: Len W. Haleen
  • Aggressive convective drying in a conical screw type mixer/dryer
    Patent number: 5709036
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to a conical screw type mixer/dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: January 20, 1998
    Inventor: Len W. Haleen
  • Aggressive convective drying in an nutsche type filter/dryer
    Patent number: 5659971
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to a nutsche type filter/dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: August 26, 1997
    Assignee: Mallinckrodt Medical, Inc.
    Inventor: Len W. Haleen
  • Aggressive convective drying in an agitated pan type dryer
    Patent number: 5546676
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to an agitated pan type dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: August 20, 1996
    Assignee: Mallinckrodt Medical, Inc.
    Inventor: Len W. Haleen
  • Aggressive convective drying in a conical screw type mixer/dryer
    Patent number: 5544424
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to a conical screw type mixer/dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: August 13, 1996
    Assignee: Mallinckrodt Medical, Inc.
    Inventor: Len W. Haleen
  • Aggressive convective drying in a nutsche type filter/dryer
    Patent number: 5544425
    Abstract: The present invention relates to improved drying techniques which increase the capacity and efficiency of agitated pan type dryers. In particular, the present invention relates to a nutsche type filter/dryer apparatus and method for aggressive convective drying of hard to dry chemical compounds, such as pharmaceuticals. The aggressive drying is brought about by creating turbulence within the drying vessel during the drying cycle. Significant reductions in drying cycle times have been achieved.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: August 13, 1996
    Assignee: Mallinckrodt Medical, Inc.
    Inventor: Len W. Haleen