Patent ID: 11903512
Assignee: ALL-CLAD METALCRAFTERS, L.L.C.
Field: Surface technology, coating (Chemistry)
Classification: CPC A  B  C  H | IPC A  B  H

Claim 15:
16. A method of making multi-layer, bonded cookware, the method comprising:
stacking a plurality of metal layers in a stacked blank assembly, the plurality of metal layers comprising:
an upper layer of stainless steel;
an intermediate layer of copper; and
a lower layer of stainless steel; and

applying heat and pressure to the stacked blank assembly for a predetermined period of time such that the plurality of metal layers are metallurgically bonded via solid state bonding to form a bonded blank assembly,
wherein the upper layer and the lower layer are formed from a terrific stainless steel, and
wherein the intermediate layer is formed from a copper alloy having controlled grain growth properties.