(US5773161-A)      A bipolar separator (1) is formed from a stainless steel plate compatible with an oxidant gas. It has surfaces (2A,2B) including a nickel laminate or cladding compatible with fuel gas. The plate incorporates opposing troughs (4A,4B and 4C,4D) around a central area (3).    Troughs (4A,4B) form wet seal rails for the cathode when the separator is used in a fuel cell unit. Troughs (4C,4D) form rails resulting in wet seals for the anode.    USE -   Provides improved bipolar separator which is simpler to fabricate e.g. using simple stamping and bending operations, and which is resistant to corrosion and assists in electrolyte management in fuel cell stack.    (EP931359-A1)      A bipolar separator (1) is formed from a stainless steel plate compatible with an oxidant gas. It has surfaces (2A,2B) including a nickel laminate or cladding compatible with fuel gas. The plate incorporates opposing troughs (4A,4B and 4C,4D) around a central area (3).    Troughs (4A,4B) form wet seal rails for the cathode when the separator is used in a fuel cell unit. Troughs (4C,4D) form rails resulting in wet seals for the anode.    USE -   Provides improved bipolar separator which is simpler to fabricate e.g. using simple stamping and bending operations, and which is resistant to corrosion and assists in electrolyte management in fuel cell stack.    (CN1255241-A)      A bipolar separator (1) is formed from a stainless steel plate compatible with an oxidant gas. It has surfaces (2A,2B) including a nickel laminate or cladding compatible with fuel gas. The plate incorporates opposing troughs (4A,4B and 4C,4D) around a central area (3).    Troughs (4A,4B) form wet seal rails for the cathode when the separator is used in a fuel cell unit. Troughs (4C,4D) form rails resulting in wet seals for the anode.    USE -   Provides improved bipolar separator which is simpler to fabricate e.g. using simple stamping and bending operations, and which is resistant to corrosion and assists in electrolyte management in fuel cell stack.    (JP2001505352-W)      A bipolar separator (1) is formed from a stainless steel plate compatible with an oxidant gas. It has surfaces (2A,2B) including a nickel laminate or cladding compatible with fuel gas. The plate incorporates opposing troughs (4A,4B and 4C,4D) around a central area (3).    Troughs (4A,4B) form wet seal rails for the cathode when the separator is used in a fuel cell unit. Troughs (4C,4D) form rails resulting in wet seals for the anode.    USE -   Provides improved bipolar separator which is simpler to fabricate e.g. using simple stamping and bending operations, and which is resistant to corrosion and assists in electrolyte management in fuel cell stack.