US5037705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen-containing molybdenum metal powder and processes for its preparation
Assignee: H.C. Starck GmbH
•
Filing: 1990-09-20
•
Granted: 1991-08-06
•
Expires: 2010-09-20
Abstract
Abstract A molybdenum metal powder having an outer shell coating of MoO 2 is useful in flame spray or plasma spray processes and is prepared by partially oxidizing molybdenum powder in a carbon dioxide atmosphere at temperatures of up to 1200° C.
Inventors
- 👤 Theodor A. Weber
- 👤 Wolfgang Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:34
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
Molybdenum metal powder particles having a molybdenum oxide shell which consists essentially of MoO 2 .
Claim 2
Dependent Claim
16 words
Molybdenum metal powder particles having a molybdenum oxide shell which consists essentially of MoO 2 .
Claim 3
Dependent Claim
25 words
Molybdenum metal powder with an oxide shell according to claim 1 wherein the oxygen content of the powder is 1 to 18 percent by weight.
Claim 4
Dependent Claim
21 words
Molybdenum metal powder with an oxide shell according to claim 2 wherein the oxygen content is 2 to 12% by weight.
Claim 5
Dependent Claim
39 words
Molybdenum metal powder with an oxide shell according to claim 1 wherein the average particle diameter of the molybdenum metal powder is 5 to 90 μm and the thickness of the MoO 2 shell is 0.1 to 20 μm.
References Cited (Backward Citations)
US3407057A
Cited
US3819384A
Cited
US3890137A
Cited
US3881911A
Cited
US3973948A
Cited
US3909241A
Cited
US3907546A
Cited
US4146388A
Cited
EP0233574A2
Cited
US4624700A
Cited
US4684400A
Cited
US4758406A
Cited
US4758406B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |