US3212923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for aluminizing ferrous metals
Assignee: North American Aviation Corp
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Filing: 1962-11-30
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Granted: 1965-10-19
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 George V Sneesby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:55
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AN IMPROVED METHOD OF PROVIDING A DIFFUSION COATING OF ALUMINUM ON A FERROUS METAL BASE WHICH COMPRISES PROVIDING A MOLTEN SODIUM BATH IN AN INERT ATMOSPHERE, ADDING EFFECTIVE AMOUNTS OF ALUMINUM AND CHROMIUM TO BATH, AND MAINTAINING SAID BASE METAL IN SAID BATH UNTIL A DIFFUSION COATING OF THE DESIRED THICKNESS IS OBTAINED.
Claim 2
Dependent Claim
53 words
AN IMPROVED METHOD OF PROVIDING A DIFFUSION COATING OF ALUMINUM ON A FERROUS METAL BASE WHICH COMPRISES PROVIDING A MOLTEN SODIUM BATH IN AN INERT ATMOSPHERE, ADDING EFFECTIVE AMOUNTS OF ALUMINUM AND CHROMIUM TO BATH, AND MAINTAINING SAID BASE METAL IN SAID BATH UNTIL A DIFFUSION COATING OF THE DESIRED THICKNESS IS OBTAINED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |