Patent US3420689A successfully refreshed from Google Patents.
US3420689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming an oxidation resistant coating on a substrate
Assignee: General Electric Co
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Filing: 1965-12-21
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Granted: 1969-01-07
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Expires: 1985-12-21
Abstract
No abstract record available.
Inventors
- 👤 Stephen Foldes
- 👤 Moses A Levinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:07
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C23C24/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS FOR FORMING A PROTECTIVE COATING ON AN EXPOSED SURFACE OF A BODY FORMED OF A BASE METAL SELECTED FROM THE GROUP CONSISTING COLUMBIUM, COLUMBIUM BASE ALLOYS, TANTALUM AND TANTALUM BASE ALLOYS COMPRISING PLATING SAID BODY WITH A COATING OF SILVER, APPLYING OVER SAID SILVER COATING A COATING OF A METAL POWDER CONSISTING OF ALUMINUM AND UP TO 50 TOTAL WEIGHT PERCENT OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, SILICON AND TITANIUM, AND FUSING SAID COATINGS TO SAID BASE METAL BY HEATING SAID COMPOSITE BODY IN A NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE SUFFICIENTLY HIGH TO CAUSE FUSION OF THE COATINGS TO EACH OTHER AND TO THE BASE METAL.
Claim 2
Dependent Claim
114 words
THE PROCESS FOR FORMING A PROTECTIVE COATING ON AN EXPOSED SURFACE OF A BODY FORMED OF A BASE METAL SELECTED FROM THE GROUP CONSISTING COLUMBIUM, COLUMBIUM BASE ALLOYS, TANTALUM AND TANTALUM BASE ALLOYS COMPRISING PLATING SAID BODY WITH A COATING OF SILVER, APPLYING OVER SAID SILVER COATING A COATING OF A METAL POWDER CONSISTING OF ALUMINUM AND UP TO 50 TOTAL WEIGHT PERCENT OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, SILICON AND TITANIUM, AND FUSING SAID COATINGS TO SAID BASE METAL BY HEATING SAID COMPOSITE BODY IN A NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE SUFFICIENTLY HIGH TO CAUSE FUSION OF THE COATINGS TO EACH OTHER AND TO THE BASE METAL.
References Cited (Backward Citations)
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |