4. Refrigeration
  5. Low pressure cold trap process and apparatus

Alan L. Weeks

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Electronically controlled vacuum pump

Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Reexamination Certificate

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Electronically controlled vacuum pump

Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Reexamination Certificate

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Electronically controlled vacuum pump

Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Reexamination Certificate

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Electronically controlled vacuum pump with control module

Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Patent

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Helium pressure seal for a cryogenic refrigerator

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Profile ID: LFUS-PAI-P-423821

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