1. Citing Patents
First lets look at what Scifinder provides:
2. Maleimide polymers Full Text
By Chow, Sui-Wu; Whelan, John M., Jr.
No Corporate Source data available | (1961), US | Language: Unavailable, Database: CAPLUS

2. Citing Patents
Key info:
Authors: Chow, Sui-Wu; Whelan, John M., Jr.
Patent title:Maleimide polymers
Type of patent & number: US 
Date issued: Feb 14, 1961
Date applied:Oct 20, 1958
Assignee: Union Carbide Corp.

3. Writing the patent citation:
Key info:
Authors: Chow, Sui-Wu; Whelan, John M., Jr.
Patent title:Maleimide polymers
Type of patent & number: US 
Date issued: Feb 14, 1961
Date applied:Oct 20, 1958
Assignee: Union Carbide Corp.
citation
Chow, Sui-Wu; Whelan, John M., Jr. (Union Carbide Corp.) Maleimide Polymers. US Patent 2,971,944, February 14, 1961.