US2834671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing molybdenum
Assignee: Individual
•
Filing: 1954-05-13
•
Granted: 1958-05-13
•
Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 John S Nachtman
- 👤 Poole Henry Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:48
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE METHOD OF PRODUCING METALLIC MOLYBDENUM FROM IT SULFIDE BY HEATING MOLYBDENUM SULFIDE WITH TIN UNDER NON-OXIDIZING CONDITIONS AT A TEMPERATURE OF ABOUT 1200*C. AND TO ABOUT 1300*C. TO REDUCE MOLYBDENUM SULFIDE IN THE SOLID PHASE WITH TIN IN THE LIQUID PHASE TO OBTAIN A PURIFIED MOLYBDENUM.
Claim 2
Independent Claim
47 words
THE METHOD OF PRODUCING METALLIC MOLYBDENUM FROM IT SULFIDE BY HEATING MOLYBDENUM SULFIDE WITH TIN UNDER NON-OXIDIZING CONDITIONS AT A TEMPERATURE OF ABOUT 1200*C. AND TO ABOUT 1300*C. TO REDUCE MOLYBDENUM SULFIDE IN THE SOLID PHASE WITH TIN IN THE LIQUID PHASE TO OBTAIN A PURIFIED MOLYBDENUM.
References Cited (Backward Citations)
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Cited
US2561526A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |