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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '264') AND (category.subclass = 'DIG39') ORDER BY date ASC, patent, type

Total of 8 patents found where: Class is '264'; Subclass is 'DIG39';

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T / S Patent Date Description Patentee Category Assigned To
U 790,214 May 16, 1905 Method of Manufacturing High Potential Earthenware Insulators
Earthenware, manufacture of hi-potential insulators
LOCKE, Fred M.
U Specimen known 1,424,924 August 8, 1922 Method of Producing Clay Bodies
Vacuum process for removing air from the clay. Patent was owned by Lapp Insulator Co.
LAPP, Grover W.
U 1,528,908 March 10, 1925 Process of Forming Ceramic Products
Process of adding reagents to accelerate hardening of the clay to reduce the time body is in mold
Manufacturing 1/2 to Frank H. Riddle
U 1,561,002 November 10, 1925 Method of Producing Clay Bodies and Apparatus Used
Vacuum process for removing air from the clay
LAPP, Grover W.
Vacuum Lapp Insulator Co., Inc.
U 1,569,251 January 12, 1926 Method of Preparing Clay or Body Composition for Ceramic Articles
Method of preparing plastic clay without the use of filter presses by mixing dry ingredients with water, filtering, and evaporation of water with heat and vacuum before sending to the pug mill
AUSTIN, Arthur O.
Manufacturing The Ohio Brass Co.
U 1,589,617 June 22, 1926 Process for Preparing Material for Ceramic Articles
Vacuum pugging after mixing dry ingredients with exact percent water needed
AUSTIN, Arthur O.
Vacuum The Ohio Brass Co.
U 2,026,782 January 7, 1936 Clay Homogenizing Method and Apparatus
Manufacturing method using vibration as the clay is extruded from the pug mill to ensure homogeneity.
Manufacturing Locke Insulator Corp.
U 2,044,332 June 16, 1936 Apparatus for Forming Ceramic Products
Manufacturing method to produce well mixed clay slip for casting insulators
ROWLAND, Davidge H.
Manufacturing Locke Insulator Corp.

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