US2920006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly refractive molybdenum bodies and method of preparing same
Assignee: Individual
•
Filing: 1957-12-13
•
Granted: 1960-01-05
•
Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Yntema
- 👤 Edward A Beidler
- 👤 Ivor E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
C; C23; C23C; C23C12/00; C23C12/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF FORMING REFRACTORY METAL BODIES RESISTANT TO OXIDATION AT ELEVATED TEMPERATURE WHICH COMPRISES HEATING A MOLYBDENUM BODY TO A TEMPERATURE EXCEEDING ABOUT 1400* C, SIMULTANEOUSLY DEPOSITING BORON AND SILICON ON THE BODY BY PASSING A MIXTURE OF HYDROGEN SUBSTANTIALLY FREE FROM WATER VAPOR AND OXYGEN AND VAPORS OF A BORON HALIDE AND A SLICON HALIDE OVER THE HEATED BODY, AND MAINTAINING THE DEPOSITED BORON AND SILICON IN CONTACT WITH SAID HEATED BODY UNTIL THEY REACT WITH THE SURFACE PORTIONS OF THE BODY, THE MOLAR RATIO OF SILICON HALIDE TO BORON HALIDE IN SAID MIXTURE CONTAINING ABOUT 2.5:1 TO ABOUT 18:1, THE SAID MIXTURE CONTAINING HYDROGEN IN AN AMOUNT OF FROM ABOUT 195 TO ABOUT 6 TIMES THE AMOUNT THEORETICALLY REQUIRED TO REDUCE THE HALIDES.
Claim 2
Independent Claim
126 words
THE METHOD OF FORMING REFRACTORY METAL BODIES RESISTANT TO OXIDATION AT ELEVATED TEMPERATURE WHICH COMPRISES HEATING A MOLYBDENUM BODY TO A TEMPERATURE EXCEEDING ABOUT 1400* C, SIMULTANEOUSLY DEPOSITING BORON AND SILICON ON THE BODY BY PASSING A MIXTURE OF HYDROGEN SUBSTANTIALLY FREE FROM WATER VAPOR AND OXYGEN AND VAPORS OF A BORON HALIDE AND A SLICON HALIDE OVER THE HEATED BODY, AND MAINTAINING THE DEPOSITED BORON AND SILICON IN CONTACT WITH SAID HEATED BODY UNTIL THEY REACT WITH THE SURFACE PORTIONS OF THE BODY, THE MOLAR RATIO OF SILICON HALIDE TO BORON HALIDE IN SAID MIXTURE CONTAINING ABOUT 2.5:1 TO ABOUT 18:1, THE SAID MIXTURE CONTAINING HYDROGEN IN AN AMOUNT OF FROM ABOUT 195 TO ABOUT 6 TIMES THE AMOUNT THEORETICALLY REQUIRED TO REDUCE THE HALIDES.
References Cited (Backward Citations)
US2313410A
Cited
US2665998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |