US3274652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing a casting mould by determination of isothermal pattern
Assignee: Distington Engineering Co Ltd
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Filing: 1964-08-24
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Granted: 1966-09-27
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Banks Allan Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:51
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF CONSTRUCTING A CASTING MOLD FOR CASTING METAL, THE MOLD HAVING A CAVITY OF GIVEN CROSS-SECTIONAL SHAPE AND DIMENSIONS, SAID METHOD COMPRIING THE STEPS OF: (A) DETERMINING THE CROSS-SECTIONAL ISOTHERMAL PATTERN WHICH EXISTS IN THE WALL OF A TRIAL MOLD HAVING A WALL OF UNIFORM THICKNESS AND A CAVITY OF GIVEN SHAPE AND DIMENSION DURING COOLING OF METAL CAST IN SUCH MOLD; AND (B) CONSTRUCTING A FINAL MOLD HAVING A CAVITY OF SAID GIVEN CROSS-SECTIONAL SHAPE AND DIMENSION AND HAVING A WALL THE OUTER CROSS-SECTIONAL PERIPHERY OF WHICH CONFORMS SUBSTANTIALLY TO A SELECTED ONE OF THE ISOTHERMS OF SAID ISOTHERMAL PATTERN.
Claim 2
Independent Claim
103 words
A METHOD OF CONSTRUCTING A CASTING MOLD FOR CASTING METAL, THE MOLD HAVING A CAVITY OF GIVEN CROSS-SECTIONAL SHAPE AND DIMENSIONS, SAID METHOD COMPRIING THE STEPS OF: (A) DETERMINING THE CROSS-SECTIONAL ISOTHERMAL PATTERN WHICH EXISTS IN THE WALL OF A TRIAL MOLD HAVING A WALL OF UNIFORM THICKNESS AND A CAVITY OF GIVEN SHAPE AND DIMENSION DURING COOLING OF METAL CAST IN SUCH MOLD; AND (B) CONSTRUCTING A FINAL MOLD HAVING A CAVITY OF SAID GIVEN CROSS-SECTIONAL SHAPE AND DIMENSION AND HAVING A WALL THE OUTER CROSS-SECTIONAL PERIPHERY OF WHICH CONFORMS SUBSTANTIALLY TO A SELECTED ONE OF THE ISOTHERMS OF SAID ISOTHERMAL PATTERN.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |