Patent US2887420A successfully refreshed from Google Patents.
US2887420A
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Surface treatments for articles made from heat resisting alloys
Assignee: Bristol Aero Engines Ltd
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Filing: 1957-04-01
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Granted: 1959-05-19
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Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Llewelyn Geirionydd
- 👤 Ubank Raymond George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:45
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SURFACE TREATMENT FOR AN ARTICLE HAVING A FINISHED SURFACE AND MADE FROM A METAL OF ALLOY WHICH SUBJECT TO OXIDATION PENETRATING BETWEEN THE GRAIN BOUNDARIES, SAID TREATMENT COMPRISING HEATING THE ARTICLE IN CONTACT WITH A POWDERED ALLOY CONTAINING NOT LESS THAN 15% BY WEIGHT OF TITANIUM AND NOT LESS THAN 6% BY WEIGHT OF ALUMINUM THE REMAINDER CONSISTING ESSENTIALLY OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND IRON AND IN AN ATMOSPHERE WHICH IS INERT IN RELATION TO THE METALS OF WHICH THE ARTICLE AND THE POWDERED ALLOY ARE COMPOSED, THE ARTICLE BEING HEATED AT A TEMPERATURE SUBSTANTIALLY BETWEEN 1000*C. AND 1190*C., AND FOR A TIME SUFFICIENT TO FORM A MODIFIED LAYER ON THE SURFACE OF THE ARTICLE, THE ARTICLE BEING THEREAFTER COOLED.
Claim 2
Dependent Claim
127 words
A SURFACE TREATMENT FOR AN ARTICLE HAVING A FINISHED SURFACE AND MADE FROM A METAL OF ALLOY WHICH SUBJECT TO OXIDATION PENETRATING BETWEEN THE GRAIN BOUNDARIES, SAID TREATMENT COMPRISING HEATING THE ARTICLE IN CONTACT WITH A POWDERED ALLOY CONTAINING NOT LESS THAN 15% BY WEIGHT OF TITANIUM AND NOT LESS THAN 6% BY WEIGHT OF ALUMINUM THE REMAINDER CONSISTING ESSENTIALLY OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND IRON AND IN AN ATMOSPHERE WHICH IS INERT IN RELATION TO THE METALS OF WHICH THE ARTICLE AND THE POWDERED ALLOY ARE COMPOSED, THE ARTICLE BEING HEATED AT A TEMPERATURE SUBSTANTIALLY BETWEEN 1000*C. AND 1190*C., AND FOR A TIME SUFFICIENT TO FORM A MODIFIED LAYER ON THE SURFACE OF THE ARTICLE, THE ARTICLE BEING THEREAFTER COOLED.
References Cited (Backward Citations)
US986504A
Cited
US2555372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |