Richard L. Leonard

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Decatur, AL, US

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Patents Grantslast 30 patents

Information Patent Grant
Wet spinning process for aramid polymer containing salts
- Patent number 5,667,743
- Issue date Sep 16, 1997
- E. I. Du Pont de Nemours and Company
- Tsung-Ming Tai
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Multi-zoned hollow fiber permeator
- Patent number 4,220,535
- Issue date Sep 2, 1980
- Monsanto Company
- Richard L. Leonard
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for filtering through highly permeable acrylic hollow fibers
- Patent number 4,209,307
- Issue date Jun 24, 1980
- Monsanto Company
- Richard L. Leonard
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Asymmetric hollow acrylic fibers
- Patent number 4,084,036
- Issue date Apr 11, 1978
- Monsanto Company
- Richard L. Leonard
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Hollow fiber membranes of ethylene copolymers and process for use
- Patent number 4,082,658
- Issue date Apr 4, 1978
- Monsanto Company
- Alfred Keith Fritzsche
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Method for producing highly permeable acrylic hollow fibers
- Patent number 3,975,478
- Issue date Aug 17, 1976
- Monsanto Company
- Richard L. Leonard
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING