There is no absolute proof of that, however. The very first jars with the patent date embossing are believed to have been made at the “Crowleytown” Glass Works (more accurately the Atlantic Glass Works), located in Washington Township, New Jersey.

His improvement revolutionized home canning in the United States. Similar screw-threading had 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. 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. John Landis Mason was awarded patent #22186, issued on Novemby the U.S. NOTE: Other Patent Nov 30th 1858 reproduction jars are reported with a mold number “ H430” on the base (thank you Chris!). These are also recently-made imports from Asia. Īlso…….as 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”). They were likely recent imports from Asia !!! If anyone has further info on this type of jar, or knows of other mold numbers that ID fakes, please contact me!. We can be assured that ALL jars with this mold number are reproductions (modern fakes or ‘fantasy’ jars).

NOTE OF CAUTION: 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. Note: many reproductions of these jars have been made (from the 1970s all the way up to the present time), which are discussed later in this article. The “ MASON’S / PATENT / NOV 30TH / 1858” phrase was originally embossed on countless glass fruit jars (canning jars), most ranging in age from circa 1858 to the mid-1910s.

Gallon mason jars