Patent information:

Patent:Utility 61,390
Patented:January 22, 1867
Applied:
Title:Improved Compound for Telegraph Insulators, and for Other Purposes
Description:Heating earthenware insulators to 400-500 degrees and dipping into asphaltic compound that has been mixed with sulfur, silicic acid, and silicate of alumina to provide a hard, weather-resistant coating
Category:Coating
Assigned to: 

Patentee Information:

BOYNTON, John F. Syracuse, NY

Class and subclass information:

Class:106COMPOSITIONS: COATING OR PLASTIC
Subclass:660COATING OR PLASTIC COMPOSITIONS Inorganic settable ingredient containing Wax containing (e.g., petroleum wax, beeswax, montan wax, carnauba wax, spermaceti, etc.);
Class:106COMPOSITIONS: COATING OR PLASTIC
Subclass:274COATING OR PLASTIC COMPOSITIONS Bituminous material or tarry residue With sulfurizing or sulfonating agent;
Class:106COMPOSITIONS: COATING OR PLASTIC
Subclass:668COATING OR PLASTIC COMPOSITIONS Inorganic settable ingredient containing Bituminous material or tarry residue, pitch, or coal containing;
Class:106COMPOSITIONS: COATING OR PLASTIC
Subclass:815COATING OR PLASTIC COMPOSITIONS Inorganic settable ingredient containing Boron, sulfur, or halogen containing (e.g., alum, etc.);
Class:501COMPOSITIONS: CERAMIC
Subclass:140CERAMIC COMPOSITIONS Elemental sulfur containing;

Known specimens:

None known