Dating a uno vac thermos
It was not a household item fit for everyday use like carrying warm coffee.Dewar did not register a patent for his invention and it was subsequently patented by Thermos, to whom Dewar lost a court case in claiming the rights to the invention. Mason was also on the property, and it was also a part of the purchase.A group of citizens under the group "Norwich Boomers" rallied the community to purchase 27 acres of land for 0 an acre so that it could be used for the Thermos. Together, the citizens and the city raised ,000.To do this, Dewar placed a glass bottle in another larger glass bottle, and evacuated the air between the two bottle walls.
In doing so, Dewar created a partial vacuum to keep the temperature of the contents stable.The American Thermos Bottle Company became The American Thermos Products Company, and the Canadian Thermos Bottle Co. changed its name to Canadian Thermos Products Limited.