Carborundum Man

Silver Age
Carborundum Man appeared before the Union of Super Heroes to claim to use his brain to catch the elusive Diamond Gang. After studying information on the jewels the gang are made of, he devised a plan to capture them at a sports stadium, using their psychological weaknesses.

He carried a handgun that appeared to fire standard bullets.

Public Domain Appearances

 * Archie's Madhouse #46

Renewal Notes
A number of Archie's Madhouse Comics never registered its titles with the US copyright office, nor did it include a correct copyright notice on their books. According to US copyright law, all works published between 1923-1977 that did not comply with copyright law became public domain upon publication. So, because the this issue had an incorrect notice, the characters featured in it fell into the public domain.