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(**) Reissue patents were not separately numbered until 1838.

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: It has come to my attention that some oddly colored Nov 30th 1858-type jars (shades of red and yellow, probably other colors exist) have recently surfaced for sale on auction sites. We can be assured that ALL jars with this mold number are reproductions (modern fakes or ‘fantasy’ jars). If anyone has further info on this type of jar, or knows of other mold numbers that ID fakes, please contact me! Also…….of August 4, 2014, unusually colored midget (Consolidated Fruit Jar Company logo) NOV 30TH 1858 jars have been reported with a mold number on the base: H39s (the “9” is backwards and the “S” looks somewhat like a backward “Z”). ********************************************************************** John Landis Mason was awarded patent #22186, issued on November 30, 1858 by the U. Patent & Trademark Office (actually the patent was termed an “Improvement in screw-neck bottles”), for his invention concerning the process of creating a threaded screw-type closure on bottles and jars.

Similar screw-threading been done before on some bottles, but the process of forming the upper lip area of the container (so that it was smooth, even, and sturdy enough for a lid of standard size to be screwed thereon) was difficult and expensive to do properly, often with unsatisfactory results.

The United States patent number for each year is the first patent issued that calendar year.

A patent date is when something was patented, not when it was actually made, many items were manufactured for many years after it the patent was granted.

These dates are a handy reference that you may find useful for figuring out when an item was first produced.

For example, if you find something with a patent number of 1,941,448 on it, you will find in the chart below that it was patented in 1933.

This “MASON’S / PATENT / NOV 30TH / 1858” phrase was originally embossed on countless glass fruit jars (canning jars) ranging in age from circa 1858 to the early 1920s.

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