Kwok Kiang Yee, Age 7914821 58Th St, Flushing, NY 11355
Kwok Yee Phones & Addresses
14821 58Th St, Flushing, NY 11355 (718) 358-3142
4243 Elbertson St, Elmhurst, NY 11373 (718) 358-3142
Bellows Falls, VT
1050 Hempstead Tpke, Franklin Square, NY 11010
Mentions for Kwok Kiang Yee
Publications & IP owners
Us Patents
Diacetylene Time-Temperature Indicators
US Patent:
4228126, Oct 14, 1980
Filed:
Nov 25, 1977
Appl. No.:
5/854933
Inventors:
Gordhanbhai N. Patel - Morris Plains NJ
Kwok C. Yee - Randolph NJ
Kwok C. Yee - Randolph NJ
Assignee:
Allied Chemical Corporation - Morris Township, Morris County NJ
International Classification:
G01N 2106
US Classification:
422 56
Abstract:
An improved recording device is described, useful for measuring the integrated time-temperature or integrated radiation-dosage history of an article, comprising a substrate onto which an acetylenic compound, containing at least two conjugated C. tbd. C groups, in an inactive form, is deposited. The inactive form is capable of being converted by melt or solvent recrystallization to an active form, which undergoes 1,4-addition polymerization resulting in an irreversible, progressive color change. The color change produced at any given point in time represents an integrated time-temperature history of thermal annealing or integrated radiation-dosage history of exposure to actinic radiation to which an article has been exposed. Also described is a process for producing an inactive form of the acetylenic compound. A film and a fiber, made from the inactive form of an acetylenic compound are also described.
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