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:
Feb. 23, 1999
Filed:
Mar. 26, 1997
Manfred Kahn, Alexandria, VA (US);
Mark Chase, Laurel, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The process for making a porous mass containing dense aggregates or granu includes the steps of mixing powder with more than 10% by weight of a binder to form agglomerated powder, heating the agglomerated powder to remove the binder and to grow crystallites in the powder to an average diameter exceeding 5 microns to form a porous mass containing the dense aggregates, and cooling the porous mass. The porous mass is broken up, if it is cohesive, into the aggregates containing the crystallites and the aggregates can be used to make an article, such as a transducer. The transducer is essentially a thick film and its thickness is that of the ceramic aggregates of granules. The electrodes connect to the top and to the bottom of the aggragates. As a result, the transducer material operates in the 1-3 mode.