US3219477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant coatings for columbium and columbium alloys
Assignee: Individual
•
Filing: 1961-08-14
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Granted: 1965-11-23
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Grubessich Joseph
- 👤 Sama Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:02
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12771; Y10T428/12806; Y10T428/12819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF PROTECTIVELY COATING COLUMBIUM AND COLUMBIUM BASE ALLOYS AGAINST OXIDATION IN AIR AT TEMPERATURES IN THE RANGE 1100*F. TO 1800*F. THAT COMPRISES CLEANING THE SURFACE OF THE COLUMBIUM, DIPPING THE CLEANED COLUMBIUM FOR A PERIOD OF BETWEEN TWO MINUTES TO ONE HOUR IN A MOLTEN BATH CONSISTING OF AT LEAST 83 W/O TIN, 10 W/O ALUMINUM AND THE BALANCE SELECTED FROM THE GROUP CONSISTING OF ZINC, IRON, CHROMIUM AND TITANIUM, SAID BATH BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 1300*F. AND 1900*F. TO COAT THE COLUMBIUM, AND THEN REMOVING THE COATED COLUMBIUM FROM THE SAID BATH.
Claim 2
Independent Claim
98 words
THE METHOD OF PROTECTIVELY COATING COLUMBIUM AND COLUMBIUM BASE ALLOYS AGAINST OXIDATION IN AIR AT TEMPERATURES IN THE RANGE 1100*F. TO 1800*F. THAT COMPRISES CLEANING THE SURFACE OF THE COLUMBIUM, DIPPING THE CLEANED COLUMBIUM FOR A PERIOD OF BETWEEN TWO MINUTES TO ONE HOUR IN A MOLTEN BATH CONSISTING OF AT LEAST 83 W/O TIN, 10 W/O ALUMINUM AND THE BALANCE SELECTED FROM THE GROUP CONSISTING OF ZINC, IRON, CHROMIUM AND TITANIUM, SAID BATH BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 1300*F. AND 1900*F. TO COAT THE COLUMBIUM, AND THEN REMOVING THE COATED COLUMBIUM FROM THE SAID BATH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |