Container of coolant

Measuring and testing – Liquid level or depth gauge – Sight glass

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Details

73323, G01F 2302

Patent

active

060216697

ABSTRACT:
A container of coolant used in a NIKON.TM. stepper is utilizing a transparent duct mounted on a side of the container of coolant to check a liquid level. The container of coolant can be conventional or other similar container of coolant.

REFERENCES:
patent: 189778 (1877-04-01), Paquette
patent: 1902276 (1933-03-01), Bull
patent: 3525231 (1970-08-01), Armstrong
patent: 3592018 (1971-07-01), Widdowson
patent: 4107999 (1978-08-01), Lang
patent: 4220048 (1980-09-01), Grepiotis et al.
patent: 4888980 (1989-12-01), DeRome

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