William L. Harpel

Person

Langhorne, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Metal cleaning method
- Patent number 5,909,742
- Issue date Jun 8, 1999
- BetzDearborn Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Passivation method and composition for galvanized metal surfaces
- Patent number 5,772,740
- Issue date Jun 30, 1998
- BetzDearborn Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Passivation method and composition for galvanized metal surfaces
- Patent number 5,700,525
- Issue date Dec 23, 1997
- BetzDearborn Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Composition for and method of monitoring dried-in-place non-chrome...
- Patent number 5,641,537
- Issue date Jun 24, 1997
- BetzDearborn Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Low phosphorous, low etch cleaner and method
- Patent number 5,545,347
- Issue date Aug 13, 1996
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Chromium and fluoride free metal treatment
- Patent number 5,518,555
- Issue date May 21, 1996
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Visible dried-in-place non-chrome polyacrylamide based treatment fo...
- Patent number 5,505,792
- Issue date Apr 9, 1996
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Composition for and method of monitoring dried-in-place non-chrome...
- Patent number 5,500,053
- Issue date Mar 19, 1996
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Low phosphorous, low etch cleaner and method
- Patent number 5,472,630
- Issue date Dec 5, 1995
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Composition for a method of monitoring dried-in-place non-chrome po...
- Patent number 5,451,270
- Issue date Sep 19, 1995
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of monitoring dried-in-place non-chrome polyacrylamide based...
- Patent number 5,401,333
- Issue date Mar 28, 1995
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Treatment for galvanized metal
- Patent number 5,344,504
- Issue date Sep 6, 1994
- Betz Laboratories, Inc.
- Philip D. Deck
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Non-chromium passivation method and composition for galvanized meta...
- Patent number 5,344,505
- Issue date Sep 6, 1994
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Visible dried-in-place non-chrome treatment for aluminum
- Patent number 5,292,378
- Issue date Mar 8, 1994
- Betz Laboratories, Inc.
- Jiangbo Ouyang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Low foaming alkaline cleaner comprising a surfactant mixture of an...
- Patent number 5,114,607
- Issue date May 19, 1992
- Betz Laboratories, Inc.
- Philip D. Deck
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Hectorite based paint spray booth detackifying slurries and methods...
- Patent number 4,564,464
- Issue date Jan 14, 1986
- Betz Laboratories, Inc.
- William L. Harpel
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Paint spray booth detackification composition and method
- Patent number 4,504,395
- Issue date Mar 12, 1985
- Betz Laboratories, Inc.
- William L. Harpel
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

William L. Harpel

Person

Patents Grantslast 30 patents

Metal cleaning method

Passivation method and composition for galvanized metal surfaces

Passivation method and composition for galvanized metal surfaces

Composition for and method of monitoring dried-in-place non-chrome...

Low phosphorous, low etch cleaner and method

Chromium and fluoride free metal treatment

Visible dried-in-place non-chrome polyacrylamide based treatment fo...

Composition for and method of monitoring dried-in-place non-chrome...

Low phosphorous, low etch cleaner and method

Composition for a method of monitoring dried-in-place non-chrome po...

Method of monitoring dried-in-place non-chrome polyacrylamide based...

Treatment for galvanized metal

Non-chromium passivation method and composition for galvanized meta...

Visible dried-in-place non-chrome treatment for aluminum

Low foaming alkaline cleaner comprising a surfactant mixture of an...

Hectorite based paint spray booth detackifying slurries and methods...

Paint spray booth detackification composition and method