The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2014
Filed:
Jun. 22, 2010
Ali Berker, Saint Paul, MN (US);
Joon Chatterjee, Bloomington, MN (US);
Richard W. Greger, Saint Paul, MN (US);
Marie Aloshyna Ep Lesuffleur, Woodbury, MN (US);
Sanat Mohanty, Woodbury, MN (US);
Ali Berker, Saint Paul, MN (US);
Joon Chatterjee, Bloomington, MN (US);
Richard W. Greger, Saint Paul, MN (US);
Marie Aloshyna ep Lesuffleur, Woodbury, MN (US);
Sanat Mohanty, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A sound barrier comprises a substantially periodic array of structures disposed in a first medium having a first density, the structures being made of a second medium having a second density different from the first density, wherein one of the first and second media is a porous medium other than a porous metal, the porous medium having a porosity of at least about 0.02, and wherein the other of the first and second media is a viscoelastic or elastic medium.