Pek L. Choo

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Naperville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Colloidal silica/polyelectrolyte blends for pulp and paper applicat...
- Patent number 5,840,158
- Issue date Nov 24, 1998
- Nalco Chemical Company
- Pek Lee Choo
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Colloidal silica/polyelectrolyte blends for natural water clarifica...
- Patent number 5,667,697
- Issue date Sep 16, 1997
- Nalco Chemical Company
- Kristine S. Salmen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Colloidal silica/polyelectrolyte blends for natural water clarifica...
- Patent number 5,620,629
- Issue date Apr 15, 1997
- Nalco Chemical Company
- Kristine S. Salmen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sulfide ion-selective electrodes for control of chemical feed of or...
- Patent number 5,401,420
- Issue date Mar 28, 1995
- Nalco Chemical Company
- Kristine S. Siefert
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Method for removing metals from a fluid stream
- Patent number 5,346,627
- Issue date Sep 13, 1994
- Nalco Chemical Company
- Kristine S. Siefert
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
System using sulfide ion-selective electrodes for control of chemic...
- Patent number 5,328,599
- Issue date Jul 12, 1994
- Nalco Chemical Company
- Kristine S. Siefert
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE