Robert D. Hamann

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Eagan, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Polyurethane layer for a light directing article
- Patent number 11,567,239
- Issue date Jan 31, 2023
- 3M Innovative Properties Company
- Bimal V. Thakkar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polyurethane layer for a light directing article
- Patent number 10,884,163
- Issue date Jan 5, 2021
- 3M Innovative Properties Company
- Bimal V. Thakkar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Thermoplastic polyurethane compositions, articles, and methods thereof
- Patent number 10,590,303
- Issue date Mar 17, 2020
- 3M Innovative Properties Company
- Charlie C. Ho
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Wrapped material, and method and apparatus for wrapping and unwrapp...
- Patent number 5,848,696
- Issue date Dec 15, 1998
- Minnesota Mining and Manufacturing Company
- Dennis L. Christ
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Patents Applicationslast 30 patents

Information Patent Application
POLYURETHANE LAYER FOR A LIGHT DIRECTING ARTICLE
- Publication number 20210088695
- Publication date Mar 25, 2021
- 3M Innovative Properties Company
- Bimal V. Thakkar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
EXTRUDED POLYURETHANE SURFACE FILMS
- Publication number 20200277517
- Publication date Sep 3, 2020
- 3M Innovative Properties Company
- Charlie Chia-Tie HO
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
POLYURETHANE LAYER FOR A LIGHT DIRECTING ARTICLE
- Publication number 20180203163
- Publication date Jul 19, 2018
- 3M Innovative Properties Company
- Bimal V. Thakkar
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
THERMOPLASTIC POLYURETHANE COMPOSITIONS, ARTICLES, AND METHODS THEREOF
- Publication number 20170218226
- Publication date Aug 3, 2017
- 3M Innovative Properties Company
- Charlie C. Ho
- B32 - LAYERED PRODUCTS