US3248764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving grain structure and soundness in castings
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1964-01-08
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Granted: 1966-05-03
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Expires: 1984-01-08
Abstract
No abstract record available.
Inventors
- 👤 George D Chandley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:34
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045; C; C30; C30B; C30B11/00; C30B29/00; C30B29/60; C30B29/605
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF PROVIDING A CASTING OF CONTROLLED DIRECTIONAL ORIENTATION OF GRAIN STRUCTURE WHICH COMPRISES POSITIONING A THIN WALLED CERAMIC MOLD IN A FURNACE IN SPACED RELATION TO THE RADIATING WALLS THEREOF, CLOSING OFF A PORTION OF SAID MOLD WITH A METAL CHILL, RADIANTLY HEATING SAID FURNACE TO A POURING TEMPERATURE APPROPRIATE TO THE MOLTEN METAL TO BE CAST INTO SAID MOLD, SHIELDING OTHER PORTIONS OF SAID MOLD SELECTIVELY AGAINST RADIATED HEAT IN SAID FURNACE TO THEREBY COOPERATE WITH AND AUGMENT THE CHILLING EFFECT OF SAID CHILL TO PROVIDE A DESIRED THERMAL GRADIENT BETWEEN SAID OTHR PORTIONS AND THE
Claim 2
Independent Claim
99 words
THE METHOD OF PROVIDING A CASTING OF CONTROLLED DIRECTIONAL ORIENTATION OF GRAIN STRUCTURE WHICH COMPRISES POSITIONING A THIN WALLED CERAMIC MOLD IN A FURNACE IN SPACED RELATION TO THE RADIATING WALLS THEREOF, CLOSING OFF A PORTION OF SAID MOLD WITH A METAL CHILL, RADIANTLY HEATING SAID FURNACE TO A POURING TEMPERATURE APPROPRIATE TO THE MOLTEN METAL TO BE CAST INTO SAID MOLD, SHIELDING OTHER PORTIONS OF SAID MOLD SELECTIVELY AGAINST RADIATED HEAT IN SAID FURNACE TO THEREBY COOPERATE WITH AND AUGMENT THE CHILLING EFFECT OF SAID CHILL TO PROVIDE A DESIRED THERMAL GRADIENT BETWEEN SAID OTHR PORTIONS AND THE
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |