US3343952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a refractory metal body containing dispersed refractory metal carbides
Assignee: RTX Corp
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Filing: 1966-04-21
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Granted: 1967-09-26
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Delgrosso
- 👤 Leonard A Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0052; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF PREPARING CARBIDE DISPERSION STRENGTHENED ALLOY ARTICLES COMPRISING THE STEPS OF: FORMING FINE POWDERS OF A MATRIX METAL SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, MOLYBDENUM, TUNGSTEN, TITANIUM AND ALLOYS THEREOF, AGITATING THE POWDERS IN A FLUIDIZED BED AT 1200-2000* F. IN AN INERT GAS STREAM, INTRODUCING A CARBONACEOUS GAS INTO THE INERT GAS STREAM, THE CARBONACEOUS GAS THERMALLY DISSOCIATING AT THE BED TEMPERATURE AND CHEMICALLY REACTING WITH THE MATRIX METAL AND FORMING A THIN CARBIDE FILM ON THE INDIVIDUAL POWDER PARTICLES, ADJUSTING THE FLOW RATE OF THE CARBONACEOUS GAS TO EFFECT THE DESIRED CARBIDE FORMATION WHILE PREVENTING THE ACCUMULATION OF SUBSTANTIAL AMOUNTS OF UNALLOYED CARBON IN THE FILM, AND WORKING THE REACTED POWDERS TO PRODUCE A WROUGHT ARTICLE IN WHICH THE CARBIDE IS UNIFORMLY DISPERSED.
Claim 2
Independent Claim
129 words
THE METHOD OF PREPARING CARBIDE DISPERSION STRENGTHENED ALLOY ARTICLES COMPRISING THE STEPS OF: FORMING FINE POWDERS OF A MATRIX METAL SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, MOLYBDENUM, TUNGSTEN, TITANIUM AND ALLOYS THEREOF, AGITATING THE POWDERS IN A FLUIDIZED BED AT 1200-2000* F. IN AN INERT GAS STREAM, INTRODUCING A CARBONACEOUS GAS INTO THE INERT GAS STREAM, THE CARBONACEOUS GAS THERMALLY DISSOCIATING AT THE BED TEMPERATURE AND CHEMICALLY REACTING WITH THE MATRIX METAL AND FORMING A THIN CARBIDE FILM ON THE INDIVIDUAL POWDER PARTICLES, ADJUSTING THE FLOW RATE OF THE CARBONACEOUS GAS TO EFFECT THE DESIRED CARBIDE FORMATION WHILE PREVENTING THE ACCUMULATION OF SUBSTANTIAL AMOUNTS OF UNALLOYED CARBON IN THE FILM, AND WORKING THE REACTED POWDERS TO PRODUCE A WROUGHT ARTICLE IN WHICH THE CARBIDE IS UNIFORMLY DISPERSED.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |