High vacuum pumping method, apparatus, and techniques
United States Patent 2636664
US Patent References:
Evacuating process
- - 1950008

Electrical vacuum pump
- - 2022465

High vacuum
- - 2160863

Vapor electric device
- - 2246327

Electrical vacuum pump
- - 2282401


Inventors:
Afton, Hertzler Elmer
Publication Date:
04/28/1953
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Assignee:
Afton, Hertzler Elmer
Primary Class:
417/49
Other Classes:
310/308
International Classes:
H01J41/16; H01J41/00
US Patent References:
2404997Production of high vacua
2460175Ionic vacuum pump
2469006Apparatus for high evacuation