The Millersburg Glass Company was established on May 20, 1909 by John Fenton on a 54.7 acre site in Millersburg, Ohio. John designed the first two molds. They were Ohio Star and Hobstar and Feather.
Earlier, John Fenton had helped to establish The Fenton Art Glass Company in Williamstown, West Virginia along with his brother Frank. The brothers had such different ideals that John left the company to start his own business.
The glass that Millersburg created was top quality and an instant success.
Millersburg was known for its fine crystal glassware. They also made iridized glass with the Fenton process in amethyst, green and soft marigold colors. These Carnival Glass patterns were so popular that a third mold called Cherry Cluster and Leaves was introduced. The response was tremendous and soon other new molds were produced.
In January of 1910 a process called "radium" was invented. The result of this process produced an attractive piece with a soft mirror finish on the front side only. This new innovative look appealed to eager buyers and became a top seller. It did so well that many of the other glass companies from this time period developed their own version of this treatment.
Millerburg prospered for the next few years. Dozens of patterns were added to the line. Many of the new molds were made by the Hipkins Mold Company.
Unfortunately John was a dreamer and while he did create the type of company and glass he had dreamed of, he was not a good bookkeeper. In late 1911 the Hipkins Mold Company called in their debt for all the work, they had done on the molds. Other bills were also called in from other companies and John found his company deeply in debt. The plant continued to produce glass but Millersburg was forced to file bankruptcy. In October of 1911, Samuel Fair bought Millersburg and renamed it the Radium Glass Company.
John Fair was not able to bring the company back to its former grandeur. In 1913, he sold the company and its assets to Frank Sinclair and the Jefferson Glass Company.
In 1919, the plant was sold to Forrester Tire and Rubber Company. The glass operation was torn down and the plant was redesigned for the production of tires.
The Information for this brief history came from the book "Standard Encyclopedia of Carnival Glass" by Bill Edwards and Mike Carwile
This is one the best sources available on Carnival Glass.