Richard A. Hutchinson

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San Antonio, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Porous pipe and process for producing same
- Patent number 5,660,209
- Issue date Aug 26, 1997
- Subsurface Technology Corp.
- James J. Franz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Porous pipe and process for producing same
- Patent number 5,462,092
- Issue date Oct 31, 1995
- Subsurface Technology Corporation
- James J. Franz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of forming porous pipe using a blowing agent carrier component
- Patent number 5,334,336
- Issue date Aug 2, 1994
- Subsurface Technology Corporation
- James J. Franz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL