Thermally-responsive materials and devices comprising such...

Compositions – Nonreactive analytical – testing – or indicating compositions

Reexamination Certificate

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C116S207000, C116S217000

Reexamination Certificate

active

08083969

ABSTRACT:
Devices are described that include a component comprised of a material having a structure of R1—C(O)—NX—R2, wherein each of R1and R2is independently a saturated alkyl having between 7-22 carbon atoms or an aryl, X is H or C(O)—Y, Y together with R1forms a ring. The material is characterized by a single, sharp melting point, thus making it suitable for use, for example, in thermo-mechanical actuating devices or in temperature-indicating devices. Also described are compositions comprising two or more materials each having a structure of Rn1—C(O)—NH—Rn2wherein, n is an identifying integer corresponding to a material in the composition; wherein for each material n in the composition, Rn1and Rn2are a saturated alkyl having between 7-22 carbon atoms, wherein for each material n Rn1and Rn2differ by one carbon atom, arid wherein the number of carbon atoms in Rn2of each material n differs by four or less.

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