Patent US3220876A successfully refreshed from Google Patents.
US3220876A
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Aluminum-containing diffusion coating for metals
Assignee: North American Aviation Corp
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Filing: 1964-06-24
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Granted: 1965-11-30
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Expires: 1984-06-24
Abstract
No abstract record available.
Inventors
- 👤 Roger D Moeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:36
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10S428/941
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF PROVIDING A DIFFUSION COATING CONTAINING ALUMINUM ON A BASE SELECTED FROM THE CLASS CONSISTING OF GROUPS IV-B, V-B, AND THE FIRST TRIAD OF GROUP VIII OF THE PERIODIC TABLE WHICH COMPRISES PLACING THE BASE METAL IN A MOLTEN SODIUM BATH MAINTAINED UNDER AN INERT EVIRONMENT AND CONTAINING A LUMIUM DISSOLVED THEREIN AND MAINTAINING SAID BASE METAL IN SAID BATH UNTIL A DIFLUSION COATING CONTAINING ALUMINUM IS OBTAINED ON SAID BASE METAL.
Claim 2
Independent Claim
74 words
THE METHOD OF PROVIDING A DIFFUSION COATING CONTAINING ALUMINUM ON A BASE SELECTED FROM THE CLASS CONSISTING OF GROUPS IV-B, V-B, AND THE FIRST TRIAD OF GROUP VIII OF THE PERIODIC TABLE WHICH COMPRISES PLACING THE BASE METAL IN A MOLTEN SODIUM BATH MAINTAINED UNDER AN INERT EVIRONMENT AND CONTAINING A LUMIUM DISSOLVED THEREIN AND MAINTAINING SAID BASE METAL IN SAID BATH UNTIL A DIFLUSION COATING CONTAINING ALUMINUM IS OBTAINED ON SAID BASE METAL.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |