US3132928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous brazing and corrosion protecting refractory metals
Assignee: Individual
•
Filing: 1962-02-26
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Granted: 1964-05-12
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Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Donald D Crooks
- 👤 Robert E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/005; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/939; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12861; Y10T428/12875; Y10T428/12944
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A COMPOSITE ARTICLE INCLUDING A BASE OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND MOLYBDENUM HAVING A MULTIPLE LAYER METAL SURFACE COATING FUSED TO SAID BASE TO PROVIDE HIGH-TEMPERATURE OXIDATION AND CORROSION RESISTANCE, SAID SURFACE COMPRISING RHODIUM INTEGRALLY BONDED TO SAID BASE METAL BY SOLID SOLUTION ALLOYS OF BASE METAL, NICKEL AND RHODIUM, SAID INTEGRALLY BONDED SURFACE BEING CHARACTERIZED BY ALLOYED STRATA RESULTING FROM A PLATING OF SAID BASE WITH THIN COATINGS OF KNICKEL AND RHODIUM AND SUBJECTION OF SAID ARTICLE TO HEAT TREATMENT AT ABOUT 2500*F. WHEREBY A FUSED INTEGRALLY BONDED SURFACE IS OBTAINED ON SAID BASE.
Claim 2
Dependent Claim
103 words
A COMPOSITE ARTICLE INCLUDING A BASE OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND MOLYBDENUM HAVING A MULTIPLE LAYER METAL SURFACE COATING FUSED TO SAID BASE TO PROVIDE HIGH-TEMPERATURE OXIDATION AND CORROSION RESISTANCE, SAID SURFACE COMPRISING RHODIUM INTEGRALLY BONDED TO SAID BASE METAL BY SOLID SOLUTION ALLOYS OF BASE METAL, NICKEL AND RHODIUM, SAID INTEGRALLY BONDED SURFACE BEING CHARACTERIZED BY ALLOYED STRATA RESULTING FROM A PLATING OF SAID BASE WITH THIN COATINGS OF KNICKEL AND RHODIUM AND SUBJECTION OF SAID ARTICLE TO HEAT TREATMENT AT ABOUT 2500*F. WHEREBY A FUSED INTEGRALLY BONDED SURFACE IS OBTAINED ON SAID BASE.
Claim 3
Independent Claim
100 words
THE METHOD OF PROTECTING REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND MOLYBDENUM ARTICLES AGAINST OXIDATION AND CORROSION AT HIGH TEMPERATURES INCLUDING THE STEPS OF CLEANING SAID METAL ARTICLES, ELECTROPLATING NICKEL THEREON OF A THICKNESS OF FROM ABOUT .0001 TO .001 INCH, THEREAFTER ELECTROPLATING RHODIUM UP TO ABOUT .0001 INCH IN THICKNESS ON THE NICKEL SURFACE, AND HEAT-TREATING SAID PLATED ARTICLE IN A PROTECTIVE NON-REACTIVE ENVIRONMENT AT ABOUT 2500*F. WHEREBY SOLID SOLUTION ALLOYS OF NICKEL WITH THE REFRACTORY METAL AND RHODIUM ARE FORMED, THEREBY INTEGRALLY BONDING AN OXIDATION AND CORROSION RESISTANT COATING ON SAID REFRACTORY METAL ARTICLE.
Claim 4
Independent Claim
100 words
THE METHOD OF PROTECTING REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND MOLYBDENUM ARTICLES AGAINST OXIDATION AND CORROSION AT HIGH TEMPERATURES INCLUDING THE STEPS OF CLEANING SAID METAL ARTICLES, ELECTROPLATING NICKEL THEREON OF A THICKNESS OF FROM ABOUT .0001 TO .001 INCH, THEREAFTER ELECTROPLATING RHODIUM UP TO ABOUT .0001 INCH IN THICKNESS ON THE NICKEL SURFACE, AND HEAT-TREATING SAID PLATED ARTICLE IN A PROTECTIVE NON-REACTIVE ENVIRONMENT AT ABOUT 2500*F. WHEREBY SOLID SOLUTION ALLOYS OF NICKEL WITH THE REFRACTORY METAL AND RHODIUM ARE FORMED, THEREBY INTEGRALLY BONDING AN OXIDATION AND CORROSION RESISTANT COATING ON SAID REFRACTORY METAL ARTICLE.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |