P. R. Mallory and Co Inc

P. R. Mallory and Co Inc (Burlington, MA) was a US producer of dry cell batteries (Mercury; alkaline Duracell), electronic components including electrolytic capacitors, and audible warning devices ("Sonalert"), it also was the parent firm of Mallory Batteries Ltd., an Irish producer of Ever Ready batteries. Ever Ready had a sizable stake in it by World War II and had a close relationship with Mallory by the late 1960s. In the US, "Eveready" batteries were a trademark of Union Carbide, which had no relationship with P.R. Mallory.

Scientists George Allis and Daniel I. Pomerantz at P. R. Mallory and Co discovered anodic bonding of glass to silicon. Their work was published in 1969 in the Journal of Applied Physics and is protected under U.S. Patent No 3,397,278.

In 1978 the company was purchased by Dart Industries and renamed Duracell after its alkaline battery brand introduced in 1964.

See also

• Eveready East Africa
• Ucar batteries
• British Ever Ready Electrical Company

References

• 1974 U.K. government document concerning monopoly in the UK battery market.
• J. App. Phys. 40, 3946 (1969) - Field assisted glass-metal sealing