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The Clarinet BBoard The C4 standard

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RE: need to decide which material to use !

Author: Hiroshi
Date: 1999-10-07 05:39

As Mark wrote Gold is very ductile. So even a 24K gold used for flute bodies includes small amount of copper to get enough solidity.How much is their proprietary knowledge. Moreover they use steels for the key shafts and steel screws.(For springs they use white gold(not platinum).

This knowledge may be applied to ligatures. For example,make a ligature made of silver but with steel or stainless steel threads(female) and male screws.

Patent expiration period is ordinarily 15 years from its petition including patent pending period. When I bought my first conventional Bonade around the early 1970,it had an etching of "patent pending"(My new inverted Bonade I bought a year ago does not seem to have this etching): Their patent may have expired. You could consult with a patent specialist near you or directly with Leblanc.

p.s. There are knowledge property web pages by IBM or US patent offices. I forgot their URL addresses.

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