Anodically polarized surface for biofouling and scale control

Patent 4345981 Issued on August 24, 1982. Estimated Expiration Date:

February 23, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

1956411

3503861

3843507

On-line amperometric analysis system and method incorporating automatic flow compensation
Patent #: 4033830
Issued on: 07/05/1977
Inventor: Fletcher, III

Anodically polarized surface for biofouling and scale control Patent #: 4256556
Issued on: 03/17/1981
Inventor: Bennett , et al.

Inventors

Assignee

Diamond Shamrock Corporation

Application

No. 06/237470 filed on 02/23/1981

US Classes:

205/701, Biological (e.g., sterilizing, etc.)205/717, Entire identifiable elemental layer or portion removed (e.g., stripping, etc.)205/724, Object protection205/738, Using anode containing precious metal205/759Using coated electrode (e.g., having electrocatalytic coating, etc.)

Examiners

Primary: Andrews, R. L.

Attorney, Agent or Firm

Hazzard; John P.

International Classes

B08B 17/00 (20060101)
C02F 1/48 (20060101)
C02F 1/467 (20060101)
C02F 1/461 (20060101)
C02F 1/46 (20060101)
C23F 15/00 (20060101)
B63B 59/00 (20060101)
B63B 59/04 (20060101)

Abstract

Biofouling and scale control in conductive aqueous systems is effected on metal, preferably valve metal such as titanium, surfaces on which such fouling normally occurs by applying thereto a stable electrocatalytic coating, anodically polarizing said valve metal coating such that essentially only oxygen is evolved at the surface thereof, preferably at a rate of at least about 4.66 millimoles per square meter per hour without evolution of any chlorine. Periodic current reversal is effected to forestall biofouling upon any cathode utilized in implementing the instant invention.