Patent US1531440A successfully refreshed from Google Patents.
Patent US2942970A successfully refreshed from Google Patents.
US2942970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hollow thermal elements
Assignee: SinterCast Corp of America
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Filing: 1955-04-19
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Granted: 1960-06-28
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Expires: 1975-04-19
Abstract
No abstract record available.
Inventors
- 👤 Claus G Goetzel
- 👤 John L Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/18; C23C4/185; B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12104; Y10T428/12139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A METHOD FOR THE PRODUCTION OF HEAT RESISTANT HOLLOW BODIES, INCLUDING TURBINE BLADES, BUCKETS, AND NOZZLE VANES, WHICH COMPRISES FORMING A CORE OF HIGH MELTING AND SUBSTANTIALLY INERT MATERIAL OF MELTING POINT ABOVE 1700*C. WITH AN EXTERNAL CONFIGURATION CONFORMING SUBSTANTIALLY INERT MATERIAL OF MELTING POINT ABOVE LOW BODY TO BE PRODUCED, PROVIDING ON SAID EXTERNAL SURFACE OF SAID CORE A POROUS COATING COMPRISING FINELY DIVIDED PARTICLES OF A REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM, TUNGSTEN, VANADIUM, COLUMBIUM, TANTALUM, TITANIUM AND ZIROCONIUM, MIXTURES OF AT LEAST TWO OF THESE METALS, THEIR CARBIDES, SILICIDES, NITRIDES, BORIDES AND COMBINATIONS THEREOF, SUBJECTING SAID COATED CORE TO A SINTERING OPERATION AT AN ELEVATED TEMPERATURE OF BETWEEN ABOUT 1200*C. TO 1700* C. TO PRODUCE A COHERENT POROUS SKELETON DISPOSING SAID SKELETON IN AN INERT REFRACTORY, CONTACTING A PORTION OF SAID SKELETON WITH A MATRIX-FORMING INFILTRANT METAL, INFILTRATING INTERSTITIALLY THE POROUS SKELETON WITH A MOLTEN MATRIX METAL HAVING A MELTING POINT BELOW THAT OF THE SKELETON MATERIAL AT A TEMPERATURE UP TO ABOUT 250*C. ABOVE SAID MELTING POINT, COOLING SAID INFILTRATED BODY TO BELOW THE SOLIDIFICATION TEMPERATURE OF THE LOWEST MELTING PHASE AND THEN SEPARATING THE CORE AND THE BEDDING MATERIAL FROM THE HOLLOW BODY.
Claim 2
Independent Claim
202 words
A METHOD FOR THE PRODUCTION OF HEAT RESISTANT HOLLOW BODIES, INCLUDING TURBINE BLADES, BUCKETS, AND NOZZLE VANES, WHICH COMPRISES FORMING A CORE OF HIGH MELTING AND SUBSTANTIALLY INERT MATERIAL OF MELTING POINT ABOVE 1700*C. WITH AN EXTERNAL CONFIGURATION CONFORMING SUBSTANTIALLY INERT MATERIAL OF MELTING POINT ABOVE LOW BODY TO BE PRODUCED, PROVIDING ON SAID EXTERNAL SURFACE OF SAID CORE A POROUS COATING COMPRISING FINELY DIVIDED PARTICLES OF A REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM, TUNGSTEN, VANADIUM, COLUMBIUM, TANTALUM, TITANIUM AND ZIROCONIUM, MIXTURES OF AT LEAST TWO OF THESE METALS, THEIR CARBIDES, SILICIDES, NITRIDES, BORIDES AND COMBINATIONS THEREOF, SUBJECTING SAID COATED CORE TO A SINTERING OPERATION AT AN ELEVATED TEMPERATURE OF BETWEEN ABOUT 1200*C. TO 1700* C. TO PRODUCE A COHERENT POROUS SKELETON DISPOSING SAID SKELETON IN AN INERT REFRACTORY, CONTACTING A PORTION OF SAID SKELETON WITH A MATRIX-FORMING INFILTRANT METAL, INFILTRATING INTERSTITIALLY THE POROUS SKELETON WITH A MOLTEN MATRIX METAL HAVING A MELTING POINT BELOW THAT OF THE SKELETON MATERIAL AT A TEMPERATURE UP TO ABOUT 250*C. ABOVE SAID MELTING POINT, COOLING SAID INFILTRATED BODY TO BELOW THE SOLIDIFICATION TEMPERATURE OF THE LOWEST MELTING PHASE AND THEN SEPARATING THE CORE AND THE BEDDING MATERIAL FROM THE HOLLOW BODY.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |