From: Richard Knoppow (dickburk@ix.netcom.com)
Date: 10/05/01-11:02:47 PM Z
At 01:58 PM 10/05/2001 -0400, you wrote:
>
>On Fri, 5 Oct 2001, Christina Z. Anderson wrote:
>
>> Actually, perhaps this whole mordancage discussion is better on the
>> pure silver list than alt process because I don't even know if it qualifies
>> as an alt process, even tho it is in Christopher James' book...
>Library photo annex on west west west 43rd St. )
>
>This was US Patent Office #2,494,068 dated Jan 10, 1950, "Photographic
>Relief Image" by Robert Speck, assignor to Eastman Kodak Co, Rochester,
>NY (and is not the "relief patent" cited above).
>
>I'll send you the page, but note here his 2 formulas:
>
>Judy
>
Tons of snipping above. Virtually any U.S. Patent can be downloaded from
the United States Patent and Trademark Office at: http://www.uspto.gov Test
and advanced searching is available for patents back to about 1975 (I may
have the exact date wrong). Earlier patents can be searched by patent
number only. Early patents are available as Class-4 FAX TIFF files. You
will need a plug-in viewer for your browser. The best is Alternatiff,
available free off the web. Do a Google search to find the site.
Off line viewing also needs a viewer. Windows 95 and 98 and probably some
others, have Wang Imaging built in. Kodak bought this from Wang and its no
longer freeware. I don't know a good free alternative to it.
I was informed that the Patent Office is converting all this stuff to
text but it will take years. If you have a patent number though you can get
the patent back to the very first ever issued. The only ones not available
are some which were destroyed years ago in a fire. Patents often make very
interesting reading, once you learn how to sift through the patentese.
---- Richard Knoppow Los Angeles, CA, USA dickburk@ix.netcom.com
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