Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Reexamination Certificate
2003-07-30
2008-03-18
Zirker, Daniel (Department: 1794)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
C428S317700, C428S343000, C428S354000
Reexamination Certificate
active
07344772
ABSTRACT:
A strip to be inserted between two elements to cause acoustic attenuation of noise propagating through at least one of the two elements. The strip is made of at least one plastic-based damping material, the strip having an equivalent real stiffness per unit length K′eqequal to at least 25 MPa and an equivalent loss factor tan δeqequal to at least 0.25.
REFERENCES:
patent: 5632835 (1997-05-01), Niwa et al.
patent: 2001/0051260 (2001-12-01), Johnson et al.
patent: 0 696 523 (1996-02-01), None
patent: 63-192608 (1988-08-01), None
Machine Translation of the Claims and Detailed Description of JP Abstract Publication 2000-272936, Oct. 3, 2000.
Horst Czichos: “Huette: Die Grundlagen der Ingenieurwissenschaften” SPRINGER-VERLAG, vol. 29, XP002178367 pp. D-44, 1989.
Drujon Frederic
Leroy Dimitri
Mottelet Beatrice
Rehfeld Marc
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Saint-Gobain Glass France
Zirker Daniel
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