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US3656975A Expired / Lapsed US ⏱️ 0.0 years remaining

Coating composition

Assignee: Teleflex Inc
•
Filing: 1970-02-16
•
Granted: 1972-04-18
•
Expires: 1990-02-16
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Abstract

Abstract The coating composition of this invention consists essentially of a dispersion of aluminum powder and zinc oxide in an aqueous solution of soluble alkali metal silicate containing dissolved chromate. The relative proportions of the ingredients in the preferred compositions are in the range of from about 100 to 500 grams aluminum powder and 30 to 100 grams zinc oxide per liter aqueous solution containing from about 200 to 1200 grams alkali metal silicate and from about 1 to 5 grams chromate. After application the coating compositions of this invention are cured to water insolubility by heat. The compositions are ideally suited for coating metals, particularly ferrous base metal, and provide excellent corrosion and abrasion resistance.

Inventors

  • 👤 Fred L Phelps Jr
  • 👤 James M Klotz

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 12:53
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/103

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 75 words
A coating composition consisting essentially of a mixture resulting from the addition of about 1,300 grams aluminum powder, 250 grams zinc oxide, 12 grams chromate acid and 650 cc. water to about 3,000 cc. of an aqueous solution of sodium silicate containing about 43 percent by weight sodium silicate and having a specific gravity of about 1.48, said aluminum powder being of generally spherical shape and having a grain size of less than 10 microns.

References Cited (Backward Citations)

US2462763A Cited
US3093493A Cited
US3180746A Cited
US3297616A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-04-18 1975-10-18 1976-04-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-18 1979-10-18 1980-04-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-18 1983-10-18 1984-04-18 $7700.00 Window Closed / Lapsed

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