The name and intellectual property (but not the factory nor equipment) was bought by Taylor Brands and used for marketing purposes.The Imperial Knife Company had its roots at the Empire Knife Company in Winsted, Connecticut.
The 863 may have been one of those, as it didn't have the swinden construction that no-one liked to work on ('cept Schrade )Hal, how right you are re. According to Tom Williams, Camillus made some Ulster Scout knives, the camper pattern, in the 1984 & 1985.
In 1903, Schrade sold all of his interest in the New York Press Button Knife Co. The following year, Schrade formed the Schrade Cutlery Company in Walden.