Charles Stempka

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Mechanicsburg, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Reclosable plastic bag and method for forming
- Patent number 6,550,965
- Issue date Apr 22, 2003
- Aeroquip Corporation
- Gregory R. Shaffer
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Polypropylene recloseable zipper
- Patent number 6,487,758
- Issue date Dec 3, 2002
- Eaton Corporation
- Gregory Richard Shaffer
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Patents Applicationslast 30 patents

Information Patent Application
Plastic biodegradable reclosable zipper for flexible packages
- Publication number 20060285773
- Publication date Dec 21, 2006
- Gregory R. Shaffer
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Polypropylene recloseable zipper
- Publication number 20020133919
- Publication date Sep 26, 2002
- EATON CORPORATION
- Gregory Richard Shaffer
- A44 - HABERDASHERY JEWELLERY
Information Patent Application
Reclosable plastic bag and method for forming
- Publication number 20010002218
- Publication date May 31, 2001
- Gregory R. Shaffer
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL