Donald E. Wiegand

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Oil sorbent material made by opening cells of a closed cell foam
- Patent number 4,183,984
- Issue date Jan 15, 1980
- Conwed Corporation
- Scott D. Browers
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Manufacture of fibrous web structures
- Patent number 4,153,488
- Issue date May 8, 1979
- Conwed Corporation
- Donald E. Wiegand
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Grant
Reinforced thermoplastic foam sheet
- Patent number 4,088,805
- Issue date May 9, 1978
- Conwed Corporation
- Donald E. Wiegand
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Polymeric and cellulosic fiber material for removing oil from water
- Patent number 4,070,287
- Issue date Jan 24, 1978
- Conweb Corporation
- Donald E. Wiegand
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Manufacture of fibrous web structures
- Patent number 3,939,532
- Issue date Feb 24, 1976
- Conwed Corporation
- Donald E. Wiegand
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING