The board's policy on copyright is not to allow copying verbatim text or scans of text/images from publications within their copyright period, Nicola, so although the original catalogues are out of copyright the scans made by the PGCC and used within their own publications are still covered by their copyright, so they should not be posted on the board.
Facts themselves are not subject to copyright, so you may extract data facts (e.g. pattern names and dates etc from any published works) and post them here in your own words, in doing so adding an attribution (source) is required - (a) it's good manners and (b) helps verify your data.
Many of the authors of reference works on glass are members here on the board so anyone trying to (ab)use their publications will also soon be spotted!