Historical clue formulations

• Cookware coating — 2026-04-20
• Polytetrafluoroethylene, familiarly — 2018-01-25
• Pan coating — 2016-03-16
• Polytetrafluoroethylene, commercially — 2015-02-18
• Cookware cover — 2013-06-22
• Pot cover — 2010-01-01
• Kitchen coat — 2007-08-02
• Pan coating — 2006-07-09
• Pan films? — 2003-08-19
• Polytetrafluoroethylene, familiarly — 1996-12-14
• Pan coating — 1996-01-15
• Nonstick surface — 1995-10-03
• Nonstick coating — 1995-05-02