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File:Jan Czochralski.jpg

Jan_Czochralski.jpg (302 × 445 pixels, file size: 81 KB, MIME type: image/jpeg)

Description
English: Jan Czochralski (1885-1953) – Polish chemist who invented the Czochralski process, which is used for growing single crystals and in the production of semiconductor wafers. From 1929 professor of Warsaw Polytechnic
Date before 1929
date QS:P,+1929-00-00T00:00:00Z/7,P1326,+1929-00-00T00:00:00Z/9
Source „IKC” 1929 see also http://audiovis.nac.gov.pl/obraz/122700/184ab9fef72918a13e8cc4178d5a190a/
Author unknown-anonymous
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Public domain
This photograph is in the public domain because according to the Art. 3 of copyright law of March 29, 1926 of the Republic of Poland and Art. 2 of copyright law of July 10, 1952 of the People's Republic of Poland, all photographs by Polish photographers (or published for the first time in Poland or simultaneously in Poland and abroad) published without a clear copyright notice before the law was changed on May 23, 1994 are assumed to be in the public domain in Poland.

This work is in the public domain in the United States because it meets three requirements:

  1. it was first published outside the United States (and not published in the U.S. within 30 days),
  2. it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
  3. it was in the public domain in its home country (Poland) on the URAA date (1 January 1996).
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Public domain
This image (or other media file) is in the public domain because its copyright has expired and its author is anonymous.
This applies to the European Union and those countries with a copyright term of 70 years after the work was made available to the public and the author never disclosed their identity.
Important: Always mention where the image comes from, as far as possible, and make sure the author never claimed authorship.
Note: In Germany and possibly other countries, certain anonymous works published before July 1, 1995 are copyrighted until 70 years after the death of the author. See Übergangsrecht. Please use this template only if the author never claimed authorship or their authorship never became public in any other way. If the work is anonymous or pseudonymous (e.g., published only under a corporate or organization's name), use this template for images published more than 70 years ago. For a work made available to the public in the United Kingdom, please use Template:PD-UK-unknown instead.
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Date/TimeThumbnailDimensionsUserComment
current19:46, 8 February 2015Thumbnail for version as of 19:46, 8 February 2015302 × 445 (81 KB)Andros64{{Information |Description ={{en|1=Jan Czochralski (1885-1953) – Polish chemist who invented the Czochralski process, which is used for growing single crystals and in the production of semiconductor wafers. From 1929 profes...

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