Visual-type hygrometer

Details Visual-type hygrometer Visual-type hygrometer

1976-02-02

1979-09-04

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

73335, 252192, 252408, 536 85, 536 89, 525361, 525363, C08L 128, C08L 3302, C08L 3506

Patent

active

041668910

ABSTRACT:
A composition of matter for use in a visual-type instrument which includes a polarizer for a light beam and an analyzer for a light beam, the chemical composition being birefringent at a first relative humidity and nonbirefringent at a second relative humidity.

REFERENCES:
patent: 3759861 (1973-09-01), Shimokawa
patent: 3776038 (1973-12-01), Elliott
patent: 3779952 (1973-12-01), Leonard, Jr.
patent: 3903064 (1975-09-01), Isigami et al.

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