US3400058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical process for andic coating of metal surfaces
Assignee: Boeing Co
•
Filing: 1965-09-21
•
Granted: 1968-09-03
•
Expires: 1985-09-21
Abstract
No abstract record available.
Inventors
- 👤 Edward C Ross
- 👤 Chambers Bryce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/26; C25D11/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A METHOD OF FORMING A PROTECTIVE COATING ON A METAL SURFACE OF METALS FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM AND THORIUM WHICH COMPRISES SUBJECTING AS ANODE AN ARTICLE HAVING A METAL SURFACE CHARACTERISTIC OF SAID GROUP TO ELECTROLYSIS IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF TWO TO EIGHT PERCENT BY WEIGHT OF AN ALKALI METAL HYDROXIDE AND ONE TO THREE PERCENT BY WEIGHT OF A WATER SOLUBLE SALT OF GLUCOMIC ACID.
References Cited (Backward Citations)
US1735286A
Cited
US1735509A
Cited
US2023522A
Cited
US2720488A
Cited
US2943031A
Cited
US2934480A
Cited
US2941929A
Cited
US2945164A
Cited
US2949411A
Cited
US3338805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |