Multilayer laminates comprising twisted nematic liquid crystals

Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With viewing layer of specified composition

Reexamination Certificate

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C428S001100, C428S001310, C428S001320, C428S001330, C428S001500, C428S001520, C428S001530, C428S001550, C428S001600, C428S001620, C428S212000, C428S412000, C428S413000, C428S414000, C428S415000, C428S417000, C428S426000, C428S429000, C428S430000, C428S438000, C428S439000, C428S441000, C428S442000, C428S447000, C428S449000, C428S451000, C428S480000, C428S483000, C428S500000, C428S515000, C428S522000, C428S523000, C359S350000, C252S299010, C252S582000, C252S587000, C349S001000, C349S016000

Reexamination Certificate

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07744970

ABSTRACT:
Provided are multilayer laminates having one or more layers comprising twisted nematic liquid crystals and one or more layers of a polymeric sheet comprising a polymer with a modulus of 20,000 psi (138 MPa) or less. The twisted nematic liquid crystal layers reflect infrared radiation. Thus, the multilayer laminates are useful to reduce the transmission of infrared energy. For example, in some embodiments the multilayer laminates are useful as windows to reduce energy consumption necessary to cool the interior of a structure such as an automobile or building. Preferably, the multilayer laminates retain the beneficial properties of safety glass. The multilayer laminates may include additional layers such as infrared absorbing layers, half wave plates, and the like, to minimize the transmission of infrared energy. The multilayer laminates may also include further additional layers such as polymeric films, polymeric sheets, rigid sheets, and the like.

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