US3989872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma spray powders
Assignee: RTX Corp
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Filing: 1974-12-19
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Granted: 1976-11-02
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Expires: 1994-12-19
Abstract
Abstract Fine powders comprising yttria stabilized zirconia powders encased in a thin calcia shell are provided for plasma spray coating processes.
Inventors
- 👤 Richard J. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:14
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
Plasma spray powder which comprises a plurality of composite particles which consist essentially of an yttria stabilized zirconia core encased in a thin calcia shell.
Claim 2
Dependent Claim
25 words
Plasma spray powder which comprises a plurality of composite particles which consist essentially of an yttria stabilized zirconia core encased in a thin calcia shell.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |