Re: Kodak B&W Paper Discontinued

From: SteveS ^lt;[email protected]>
Date: 07/13/05-12:01:34 PM Z
Message-id: <008e01c587d4$e97ac1c0$4802280a@VALUED65BAD02C>

----- Original Message -----
From: "Ryuji Suzuki" <>
Subject: Re: Kodak B&W Paper Discontinued

> It is unlikely that Kodak bothers to sell their patents when they
> discontinue some products.
- snip -
> Also, buying Kodak patents is not going to enable a small company to
> produce Kodak-quality films. Kodak products depend on not only Kodak
> inventions but also inventions by others and they have mutual
> licensing agreements. Also, patents are required to disclose the best
> mode of implementation of the invention known to the inventor but they
> are very often very short in this aspect, and also they are by no
> means required to disclose the best product design utilizing the
> invention. That is, patent may give you some information but it is not
> enough to make a product. Much of important information is kept
> proprietary.

Most times small companies will lease a patent and proprietary process; and
sometimes the factory in which it's made. This is the case with Lee filters
and the Wratten filters Kodak used to make.

Kodak employed Dr. Wratten, a physicist to measure light waves as they
effect film chemistry. His numbered system was the proprietary system by
which Kodak made their filters. This is a good equation as to what could
happen with their long toned photographic papers.

Factory made film and silver gelatin materials are not going away.

Received on Wed Jul 13 12:01:54 2005

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