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:
Jul. 13, 2010
Filed:
Jun. 30, 2003
Jürgen Nick, Neuenburg, DE;
Ulrich Siemann, Weil am Rhein, DE;
Jürgen Nick, Neuenburg, DE;
Ulrich Siemann, Weil am Rhein, DE;
LOFO High Tech Film GmbH, Weil am Rhein, DE;
Abstract
Thermoformed diaphragms made of cast polyarylate films, at least comprising one polyarylate (PAR) having a structural unit of the formula (I): where each of R, R, R, and R, independently of the others, is hydrogen, C-alkyl, C-alkoxy, or halogen, and each of Rand Rindependently of the other, is hydrogen, C-alkyl, C-alkoxy, phenyl, or halogen. The thermoformed diaphragms made of cast PAR films can be used as acoustic transducers, preferably as microphone diaphragms or loudspeaker diaphragms. The cast PAR films can be used for producing these diaphragms, and the PAR casting solutions can be used for producing the cast PAR films. There are processes for producing thermoformed diaphragms made of cast PAR films.