US3432334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying oxidation protective coatings to columbium
Assignee: RTX Corp
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Filing: 1963-12-02
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Granted: 1969-03-11
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Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 David L Yenawine
- 👤 Emanuel C Hirakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:51
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C23; C23C; C23C24/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/937; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12743; Y10T428/12771; Y10T428/12806; Y10T428/12819
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
THE METHOD OF PROTECTING COLUMBIUM AND COLUMBIUM BASE ALLOY PARTS AGAINST OXIDATION WHICH CONSISTS IN PREPARING A COATING SLURRY CONSISTING ESSENTIALLY OF ALUMINUM AND CHROMIUM POWDER IN THE PROPORTION OF 90 W/O AL+10W/O CR, AND FLUORIDE-GLASS POWDER CONSISTING OF 60 W/O LIF+3.2 W/O CAF2+17.6 W/O AIF3+19.2 W/O NAF, COATING THE PARTS TO BE PROTECTED WITH THE SLURR, DRYING THE COATED PARTS AT 250-300*F. FOR ABOUT 30 MINUTES, CURING FOR ONE HOUR AT 1800-1900*F., APPLYING A COATING OF SEALING GLASS, AND CURING AT 1400-1800*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |