United States Patent: 6,485,773

docorion, who called my attention to this patent, says that this either “falls into your ‘What were they thinking’ or your ‘A product whose time has come’ categories. Maybe both.”

Without further ado, United States patent number 6,485,773.

Personally, I use an extract of the sap of certain tropical plants, following coagulation through exposure to air for this purpose. Or a refined transparent petroleum product, depending.