| 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 = '349') ORDER BY date ASC, patent, type |
Total of 5 patents found where: Class is '264'; Subclass is '349';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1922 | ||||||
U  |
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. |
Vacuum | |
| 1925 | ||||||
| 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 |
BLEININGER, Albert V. |
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. |
| 1933 | ||||||
| U | 1,925,058 | August 29, 1933 | Process for Forming Plastic Clay Masses Wet process clay reflocculation method to eliminate pugging process |
ROWLAND, Davidge H. WETZEL, Kurt |
Wet Process | Locke Insulator Corp. |
| 1944 | ||||||
| U | 2,346,620 | April 11, 1944 | Method of Forming Insulator Bodies Method to mix water with dry ingredients to form clay of the proper water content |
SKIPPER, Edward M. |
Clay | Locke Insulator Corp. |
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