Acoustics – Sound-modifying means – Sound absorbing panels
Reexamination Certificate
2011-01-03
2011-10-11
Enad, Elvin G (Department: 2832)
Acoustics
Sound-modifying means
Sound absorbing panels
C181S286000, C428S172000, C428S215000, C428S426000, C428S436000, C428S437000
Reexamination Certificate
active
08033360
ABSTRACT:
It is an object of the present invention to provide an interlayer film for a laminated glass excellent in a sound-insulating property, which is preferably usable for a head up display and the like wherein a driver can look at the front view and an instrument display simultaneously without requiring to look down, and to provide a laminated glass.The present invention is directed to interlayer film for a laminated glass, which comprises at least a pair of protection layers and a sound-insulating layer sandwiched between the pair of the protection layers, and which has ah wedge shape as a cross-sectional shape, a wedge angle θ of 0.1 to 0.7 mrad, the maximum thickness of 2000 μm or thinner, and the minimum thickness of 400 μm or thicker, the minimum thickness of the sound-insulating layer being 20 μm or thicker.
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Connolly Bove & Lodge & Hutz LLP
Enad Elvin G
Russell Christina
Sekisui Chemical Co. Ltd.
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