Vacuum Flask - History

History

The vacuum flask was invented by Scottish physicist and chemist Sir James Dewar in 1892 and is sometimes referred to as a Dewar flask or Dewar bottle after its inventor. The first vacuum flasks for commercial use were made in 1904 when a German company, Thermos GmbH, was founded. Dewar failed to 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.

"Thermos" remains a registered trademark in some countries, but was declared a genericized trademark in the U.S. in 1963 as it is colloquially synonymous with vacuum flasks in general.

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