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US4624700A
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Method for controlling the oxygen content in agglomerated molybdenum powders
Assignee: Osram Sylvania Inc
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Filing: 1986-02-20
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Granted: 1986-11-25
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Expires: 2006-02-20
Abstract
Abstract A method is disclosed for introducing a controlled level of oxygen into agglomerated molybdenum plasma spray powder. The method involves forming a relatively uniform mixture of agglomerated powders consisting essentially of molybdenum and one or more oxygen containing compounds of molybdenum wherein said mixture has an oxygen content of greater than about 10% by weight and reducing the mixture at a sufficient temperature for a sufficient time to remove a portion of the oxygen therefrom and form a molybdenum powder having an oxygen content of no greater than about about 10% by weight.
Inventors
- 👤 David J. Port
- 👤 David L. Houck
- 👤 Frank D. Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:13
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; B; B22; B22F; B22F1/00; B22F1/17; B22F3/00; B22F3/001
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A method for introducing a controlled level of oxygen into agglomerated molybdenum plasma spray powder, said method comprising: (a) forming a relatively uniform mixture of agglomerated powders consisting essentially of molybdenum, and one or more oxygen containing compounds of molybdenum wherein said mixture has an oxygen content of greater than about 10% by weight; and (b) reducing said mixture at a sufficient temperature for a sufficient time to remove a portion of the oxygen therefrom and form a molybdenum powder having an oxygen content of no greater than about 10% by weight.
Claim 2
Independent Claim
92 words
A method for introducing a controlled level of oxygen into agglomerated molybdenum plasma spray powder, said method comprising: (a) forming a relatively uniform mixture of agglomerated powders consisting essentially of molybdenum, and one or more oxygen containing compounds of molybdenum wherein said mixture has an oxygen content of greater than about 10% by weight; and (b) reducing said mixture at a sufficient temperature for a sufficient time to remove a portion of the oxygen therefrom and form a molybdenum powder having an oxygen content of no greater than about 10% by weight.
Claim 3
Dependent Claim
17 words
A method of claim 1 wherein said mixture consists essentially of molybdenum, ammonium paramolybdate, and molybdenum oxides.
Claim 4
Dependent Claim
18 words
A method of claim 1 wherein the reducing temperature is from about 700° C. to about 1000° C.
Claim 5
Dependent Claim
23 words
A method of claim 3 wherein the oxygen content of the reduced molybdenum powder is from about 7% to about 10% by weight.
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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |