David A. Allerton

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Glenshaw, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for supporting flexible sheet while applying graded shade ba...
- Patent number 4,276,325
- Issue date Jun 30, 1981
- PPG Industries, Inc.
- Dennis S. Postupack
- B32 - LAYERED PRODUCTS
Information Patent Grant
Apparatus for forming graded shade band on substrate
- Patent number 4,254,734
- Issue date Mar 10, 1981
- PPG Industries, Inc.
- Dennis S. Postupack
- B32 - LAYERED PRODUCTS
Information Patent Grant
Apparatus for supporting flexible sheet while applying graded shade...
- Patent number 4,254,735
- Issue date Mar 10, 1981
- PPG Industries, Inc.
- Dennis S. Postupack
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method for forming graded shade band on substrate
- Patent number 4,208,446
- Issue date Jun 17, 1980
- PPG Industries, Inc.
- Dennis S. Postupack
- B32 - LAYERED PRODUCTS
Information Patent Grant
Solvent system for electrostatic shade band deposition process
- Patent number 4,139,652
- Issue date Feb 13, 1979
- PPG Industries, Inc.
- Dennis S. Postupack
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...