However, separately from the Caddo company, on October 6, 1920, Anderson-Prichard & Co. ("AP&C") had been incorporated in Delaware, with an authorized capital of 100,000 shares of no par value stock.

[1] The Anderson-Prichard company used the "APCO" brand name on a very limited basis, off and on, over the years due to uncertainty regarding having clear trademark rights.

But, in 1943, Anderson-Prichard was informed that the American Oil Company had objected to the application because they felt it was too similar to their "AMOCO" brand name.

[2] In 1960 the bulk of the company's assets sold for $123.3 million to four investor groups, including Occidental, Seagram, and Brookston Oil.

[3] One part which included Anderson-Prichard marketing and distribution units was incorporated in Delaware as a completely new company, named "APCO Oil Corporation".