US Patent: 2,419,880 - Polyvinyl resin adhesive composition, plywood, and method of making plywood


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US Patent: 2,419,880

Polyvinyl resin adhesive composition, plywood, and method of making plywood

Patentees:

Lee L. Blyler (exact or similar names) - Spotswood, NJ

John W. Clough (exact or similar names) - Parlin, NJ

Charles W. Hawley (exact or similar names) - New Brunswick, NJ

Earle C. Pitman (exact or similar names) - Red Bank, NJ

USPTO Classifications:

156/332, 428/420, 428/510, 428/537.1, 524/389, 525/157, 525/207, 525/402, 525/58

Tool Categories:

Assignees:

E. I. dup Pont de Nemours & Co. - Wilmington, DE

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Jul. 10, 1943
Granted:	Apr. 29, 1947

Patent Pictures:

USPTO (New site tip)
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Description:

This patent is one in a long series that would lead to the introduction of PVA glue. See patent 1,084,581 for an early such patent. This present patent is the earliest we have found that explicitly describes a polyvinyl alcohol adhesive. It was developed to be a stronger and less brittle alternative to the then-available adhesives manufacturing plywood.