Here is an interesting tid bit:
At one time, during and after World War II, most fire extinguishers contained Carbon Tetrachloride, an excellent fire stopper. This same chemical was also at one time used in commercial dry- cleaning establishments and within refrigeration units. Since then, however, Carbon Tetrachloride has been found to be an extremely dangerous chemical that, if inhaled or absorbed through the skin in high enough levels, can be fatal. To make things even worse, when this chemical is exposed to heat, the toxicity level inherently increases to produce phosgene, a dangerous corrosive ga--also known as "nerve gas."
These extinguishers were recalled in the late 1950s when scientists discovered just how dangerous Carbon Tetrachloride can be.
So Carbon Tet extinguishers went away by the 1960's. So that puts a 'top end' to the pyrene carbon tet line.
So, following up on something I read elsewhere was to get the patent dates of the 2 patents on what the 'wartime correct' pyrene.
US Patent 2347548 was applied for in April, 1942 (Patent Pend) and was granted in April 25th, 1944. So the two patent number don't AUTOMATICALLY disqualify it as a 'war time' unit. The patent itself was for a vent in the handle to prevent corrosion.
US Patent 1688195 was for the specific double action pump and was applied for in Oct 6th, 1925, Granted October 16th, 1928... so the first patent should always be there, and not in a Pat. Pend status.
The last discrepancy of war time and post was is the Newark New Jersey address changing to Newark 8 New Jersey.
So what does Newark 8 New Jersey mean?
http://www.coxsackie.com/reference/btc.htm"Postal zones were first used on May 1, 1943 (e.g., Los Angeles 54 or New York 16.) All large and many medium sized cities had zones. If a zone is listed you know your item dates after 1943. If no zone is listed the item might pre-date 1943. Small towns never used zones so the lack of zone means nothing. All large cities did use zones, so if the item contains a full address of a large city without a zone, the item pre-dates 1943. Unfortunately, manufacturers did not always print their full mailing address on their items. They often thought that Brooklyn NY or St. Louis Mo. was a sufficient cachet so lack of a zone could simply mean the manufacturer didn't bother to print it. Here's a research project for someone. Which cities had zones and which one's didn't? The answer can be found in the official Postal Handbooks from the 1940s and 50s (which would make a fine addition to our Center reference library!)
Zip codes replaced postal zones on July 1, 1963. All post offices, no matter how small, were assigned zip codes. So, if an item has a zip code, you know it was made after 1963. In some areas, postal zones continued to be used for some time after 1963. We have some 1965 Antiques Dealer magazines in the reference library with ads that cite postal zones rather than zip codes. But the 1963 date is a pretty good rule of thumb. "
Posted: Tue Aug 28, 2012 12:34 am