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:
Dec. 06, 2022
Filed:
Feb. 24, 2021
Lexmark International, Inc., Lexington, KY (US);
Scott Richard Castle, Lexington, KY (US);
Alexander Lloyd Chapman, Lexington, KY (US);
Keith Bryan Hardin, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
The present invention is a diverse acoustical object containing a range of particles that have acoustical wave impedances that are substantially different from the binder. The particles create a substantially different reflection as an acoustic wave is scattered by the particles. A negative reflection is created when the scattered wave is from a particle that has a wave impedance that is substantially less than the binder impedance. Practically, it may be necessary to encase this material in a thin material that will withstand the fabrication process (e.g., air or silicone elastomer could be encased in glass). If the wavelength is large compared to the encasing material thickness, then the reflection will be more dependent on the interior material. A mixture of materials that generate positive as well as negative reflections within the binder would add to the complexity of the PUF.