US2581252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder metallurgy articles
Assignee: SinterCast Corp of America
•
Filing: 1947-12-31
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Granted: 1952-01-01
•
Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Claus G Goetzel
- 👤 John L Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:58
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/04; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12063; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
COMPOSITE MATERIAL SHAPED TURBINE BLADE HAVING A BASE PORTION ENGAGEABLE WITH A TURBINE WHEEL FOR USE AT ELEVATED TEMPERATURES IN CORROSIVE ATMOSPHERES, SAID BLADE BEING COMPOSED OF SUBSTANCES OF DIFFERENT MELTING POINTS AND HAVING A SINTERED POROUS SKELETON OF HIGHER MELTING POINT NORMALLY CORRODIBLE AT THE TEMPERATURES OF OPERATION AND FORMED WITH INTERCOMMUNICATING PORES SUBSTANTIALLY THROUGHOUT ITS ENTIRETY, THE PORES THEREOF BEING PERMEATED WITH AN INFILTRANT METAL HAVING CORROSION RESISTANT PROPERTIES UNDER THE CONDITIONS OF OPERATION AND A SUBSTANTIALLY CONTINUOUS CONTROLLED LAYER OF SAID INFILTRANT METAL OF PREDETERMINED THICKNESS ON THE EXTERIOR FACES OF SAID BLADE TO PROTECT THE SAME, SAID LAYER BEING INTEGRALLY FUSED WITH THE METAL PERMEATING SAID PORES, THE LAYER BEING THICKENED AT THE BASE PORTION OF THE BLADE FOR THE SHAPED WHEEL ENGAGING PORTIONS THEREOF.
Claim 2
Dependent Claim
129 words
COMPOSITE MATERIAL SHAPED TURBINE BLADE HAVING A BASE PORTION ENGAGEABLE WITH A TURBINE WHEEL FOR USE AT ELEVATED TEMPERATURES IN CORROSIVE ATMOSPHERES, SAID BLADE BEING COMPOSED OF SUBSTANCES OF DIFFERENT MELTING POINTS AND HAVING A SINTERED POROUS SKELETON OF HIGHER MELTING POINT NORMALLY CORRODIBLE AT THE TEMPERATURES OF OPERATION AND FORMED WITH INTERCOMMUNICATING PORES SUBSTANTIALLY THROUGHOUT ITS ENTIRETY, THE PORES THEREOF BEING PERMEATED WITH AN INFILTRANT METAL HAVING CORROSION RESISTANT PROPERTIES UNDER THE CONDITIONS OF OPERATION AND A SUBSTANTIALLY CONTINUOUS CONTROLLED LAYER OF SAID INFILTRANT METAL OF PREDETERMINED THICKNESS ON THE EXTERIOR FACES OF SAID BLADE TO PROTECT THE SAME, SAID LAYER BEING INTEGRALLY FUSED WITH THE METAL PERMEATING SAID PORES, THE LAYER BEING THICKENED AT THE BASE PORTION OF THE BLADE FOR THE SHAPED WHEEL ENGAGING PORTIONS THEREOF.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |