US2946680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder metallurgy
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1955-08-10
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Granted: 1960-07-26
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Expires: 1975-08-10
Abstract
No abstract record available.
Inventors
- 👤 Raymont William Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF MAKING CORROSION RESISTANT SHAPES FROM REFRACTORY COMPOSITIONS WHICH COMPRISES FORMING A REFRACTORY POWDER INTO A SELF-SUSTAINING SHAPED PREFORM, SUPPORTING SAID PREFORM IN A POROUS CERAMIC MOLD WHICH HAS A THERMAL SHRINKAGE RATE SUBSTANTIALLY THE SAME AS THAT OF SAID PREFORM, INFILTRATING SAID PREFORM WHILE IN SAID MOLD WITH A MOLTEN CORROSION RESISTANT COMPOSITION UNDLER NON-OXIDIZING CONDITIONS, AND HEAT TREATING THE INFILTRATED PREFORM WHILE THE SAME IS STILL CONFINED IN SAID MOLD.
Claim 2
Independent Claim
74 words
THE METHOD OF MAKING CORROSION RESISTANT SHAPES FROM REFRACTORY COMPOSITIONS WHICH COMPRISES FORMING A REFRACTORY POWDER INTO A SELF-SUSTAINING SHAPED PREFORM, SUPPORTING SAID PREFORM IN A POROUS CERAMIC MOLD WHICH HAS A THERMAL SHRINKAGE RATE SUBSTANTIALLY THE SAME AS THAT OF SAID PREFORM, INFILTRATING SAID PREFORM WHILE IN SAID MOLD WITH A MOLTEN CORROSION RESISTANT COMPOSITION UNDLER NON-OXIDIZING CONDITIONS, AND HEAT TREATING THE INFILTRATED PREFORM WHILE THE SAME IS STILL CONFINED IN SAID MOLD.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |