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US 3,954,457 AGranted
Dental amalgam
OwnerGary Maurice Weikelinventor
Life of this patent
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Abstract
The addition of copper or copper-base alloys to conventional dental alloys used in amalgams (prior to the formation of the amalgam) has been found to remove tin from its normal matrix phase whereby a more corrosion resistant and clinically improved dental amalgam results.
Claims5
A dental amalgam consisting essentially of:
- a. a conventional silver base alloy consisting essentially of approximately 65% Ag, 29% Sn, up to 6% Cu and up to 2% Zn;
- b. and mixed with (a) an additive in particle form selected from the group consisting of elemental copper and copper base alloys;
- and
- c. mercury to form an amalgam with (a).
1 more element
Dependencies are inferred from the claim text.