PatentBrief

Year in Patents

Patents Granted in 1981

Landmark US patents granted in 1981 — explained in plain English. The inventions, the assignees, and what each one actually protects.

Granted in 1981

5 patents

US 4267420 · 1981 · General Mills Inc

How Microwave Crisping Sleeves Work

US 4302518 · 1981

How Lithium-Cobalt Battery Cathodes Were Invented

US 4253922 · 1981 · PPG Industries

How a Special Carbon-Fluorine Catalyst Makes Chlorine and Caustic Soda

US 4259444 · 1981 · General Electric Co

How Scientists Created Bacteria That Eat Oil Spills

biotech

US 4302536 · 1981

How to Detect Disease Markers Using Colored Proteins

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