What Does 'WD-40' Stand For?

Does the name of the iconic household product WD-40 reveal something about its invention?
The lubricating spray WD-40 is so named because it was the product of the 40th attempt at creating a water displacing substance.

Lube-Tech Automotive - What does WD-40 stand for? WD-40 stands for Water Displacement perfected on the 40th try. It took them 40 attempts to get the water displacing formula worked out! #lubetech #

What does the WD in WD 40 stand for?

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Do You Suffer From WD-40 Syndrome?, by Susan Brearley

WD40 - What Is It & What Can You Use It For? - Toolstop

Ten Uses of WD-40 in Motorcycle Maintenance

Big Idea of the Day--Eric. Big Idea? Interrogate the product Until it confesses! - ppt download

WD-40 Helps Make It Easy To Reach Hard Places - Point of Purchase International Network

WD-40 Uses - Expert Hardware

You can use the 1 gallon for soaking and dipping your tools to get the most out of the product. Drives Out Moisture Because WD-40 Multi-Use Product

WD-40® Multi-Use Product, One Gallon