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. 20, 1994
Filed:
Aug. 02, 1993
Applicant:
Inventor:
Michael J Gill, Milford on Sea, GB;
Assignee:
British Gas PLC, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
367140 ; 367152 ; 29 2535 ; 310334 ;
Abstract
A method for bonding together adjoining hollow glass spheres to form an acoustic matching member for a transducer comprises subjecting a mixture of adjoining spheres and a solution of a heat curable resin and a volatile organic solvent to a first temperature to drive off the solvent and then to a second temperature to cure the resin. This causes the spheres to bond together at their points of contact but otherwise voids are formed between the spheres.