William W. Kangas

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Mundelein, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Trapezium-shaped aqueously-swelling concrete joint-sealing article...
- Patent number 5,473,848
- Issue date Dec 12, 1995
- American Colloid Company
- William W. Kangas
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Trapezium-shaped aqueously-swelling concrete joint-sealing method
- Patent number 5,339,590
- Issue date Aug 23, 1994
- American Colloid Company
- William W. Kangas
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING