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| | Class Definition for Class 422 - CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
 | | for apparatus for brushing, beating, shaking, wiping, shotting, the use of a squeegee, or the removal of material by a draft or current of air, steam, or equivalent gaseous fluid. |
 | | and subclass 331 for processes and apparatus for preserving by refrigeration, including such steps or means combined with deodorizing, antisepticizing or germiciding the material which is subjected to refrigeration or providing a special atmosphere in a cooled space. |
 | | appropriate subclasses for apparatus for testing an electrical property or condition of a material by electrical means, even though the results of the test may be used as an indication of some other physical or chemical property or condition. |
| www.uspto.gov /web/patents/classification/uspc422/defs422.htm (3446 words) |
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