Leonard W. Barrett

Person

Maplewood, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Permeable shaped structures of active particulate bonded with PSA p...
- Patent number 6,391,429
- Issue date May 21, 2002
- 3M Innovative Properties Company
- Raymond Senkus
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Molded respirator containing sorbent particles
- Patent number 6,234,171
- Issue date May 22, 2001
- 3M Innovative Properties Company
- James E. Springett
- A41 - WEARING APPAREL
Information Patent Grant
Molded respirator containing sorbent particles
- Patent number 6,102,039
- Issue date Aug 15, 2000
- 3M Innovative Properties Company
- James E. Springett
- A41 - WEARING APPAREL
Information Patent Grant
Pressure-sensitive adhesive polyacrylate polymer microparticulate a...
- Patent number 5,952,420
- Issue date Sep 14, 1999
- Minnesota Mining and Manufacturing Company
- Raymond Senkus
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Pressure-sensitive adhesive polyacrylate polymer and method of making
- Patent number 5,696,199
- Issue date Dec 9, 1997
- Minnesota Mining and Manufacturing Company
- Raymond Senkus
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Respirator having thermochromic fit-indicating seal
- Patent number 5,617,849
- Issue date Apr 8, 1997
- Minnesota Mining and Manufacturing Company
- James E. Springett
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Nucleating agents for poly(ethylene terephthalate)
- Patent number 5,356,972
- Issue date Oct 18, 1994
- Istituto Guido Donegani S.p.A.
- Leslie H. Sperling
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Leonard W. Barrett

Person

Patents Grantslast 30 patents

Permeable shaped structures of active particulate bonded with PSA p...

Molded respirator containing sorbent particles

Molded respirator containing sorbent particles

Pressure-sensitive adhesive polyacrylate polymer microparticulate a...

Pressure-sensitive adhesive polyacrylate polymer and method of making

Respirator having thermochromic fit-indicating seal

Nucleating agents for poly(ethylene terephthalate)