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 = '501') AND (category.subclass = '149') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '501'; Subclass is '149';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1925 | ||||||
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. |
1926 | ||||||
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. |
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