US3214302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming insulating coatings on metal surfaces
Assignee: Hooker Chemical Corp
•
Filing: 1962-02-16
•
Granted: 1965-10-26
•
Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Brodt Rudolf
- 👤 Offenbach Kreis
- 👤 Bronder Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:51
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR FORMING INSULATING COATINGS ON METALLIC SURFACES WHICH COMPRISES THE STEPS OF APPLYING TO SAID SURFACE AN AQUEOUS COMPOSITION COMPRISING AS ITS ESSENTIAL INGREDIENT ABOUT 50 TO ABOUT 500 GRAMS/LITER OF A SILICATE OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, SUBJECTING THE SAID COATED SURFACE TO AN ELEVATED TEMPERATURE IN THE RANGE OF ABOUT 300*C. TO ABOUT 1200*C. TO FORM AN ANNEALED COATING ON SAID SURFACE, CONTACTING SAID COATING WITH AN AQUEOUS COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AQUEOUS ACIDICPHOSPHATES AND AQUEOUS HEXAVALENT CHROMIUM-CONTAINING COMPOSITIONS, AND SUBJECTING THE COATED SURFACE TO A TEMPERATURE IN THE RANGE OF 300*C. TO 1200*C., TO THUS FORM AN ADHERENT COATING ON SAID SURFACE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR FORMING INSULATING COATINGS ON METALLIC SURFACES WHICH COMPRISES THE STEPS OF APPLYING TO SAID SURFACE AN AQUEOUS COMPOSITION COMPRISING AS ITS ESSENTIAL INGREDIENT ABOUT 50 TO ABOUT 500 GRAMS/LITER OF A SILICATE OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, SUBJECTING THE SAID COATED SURFACE TO AN ELEVATED TEMPERATURE IN THE RANGE OF ABOUT 300*C. TO ABOUT 1200*C. TO FORM AN ANNEALED COATING ON SAID SURFACE, CONTACTING SAID COATING WITH AN AQUEOUS COMPOSITION SELECTED FROM THE GROUP CONSISTING OF AQUEOUS ACIDICPHOSPHATES AND AQUEOUS HEXAVALENT CHROMIUM-CONTAINING COMPOSITIONS, AND SUBJECTING THE COATED SURFACE TO A TEMPERATURE IN THE RANGE OF 300*C. TO 1200*C., TO THUS FORM AN ADHERENT COATING ON SAID SURFACE.
References Cited (Backward Citations)
US3030217A
Cited
US944957A
Cited
US1924311A
Cited
US1951039A
Cited
US1946146A
Cited
US1990075A
Cited
GB453226A
Cited
GB464967A
Cited
US2218058A
Cited
US2418608A
Cited
US2438013A
Cited
US2493934A
Cited
US2529206A
Cited
US2989418A
Cited
US2909454A
Cited
GB875972A
Cited
US6265232B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |