US3258818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting metals
Assignee: Symington Wayne Corp
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Filing: 1965-03-31
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Granted: 1966-07-05
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Loren W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:07
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/08; B22D17/10; B22D17/20; B22D17/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF CASTING A RUN OF METALL CASTINGS IN METAL MOLDS IN A PLURALITY OF CASTING OPERATIONS EACH PRODUCING IN A SINGLE CAST ONE OR MORE CASTINGS EACH IDENTICAL WITH A CASTING OF EVERY OTHER OPERATION, COMPRISING IN EACH CASTING OPERATION MAKING A METAL MOLD OF SUCH THERMAL DIFFUSIVITY AND MASS AS TO MAINTAIN ITS INTEGRITY TO THE POINT OF FREEZING TO SHAPE OF METAL TO BE CAST THEREIN, CASTING SAID METAL IN SAID MOLD, AND EXPENDING SAID MOLD IN SAID CASTING OPERATION TO FREE THE RUN OF CASTINGS FROM DEPENDENCY FOR PRECISENESS UPON ANY LIFE OF A MOLD BEYOND THE OPERATION IN WHICH IT IS EXPENDED.
Claim 2
Independent Claim
108 words
A METHOD OF CASTING A RUN OF METALL CASTINGS IN METAL MOLDS IN A PLURALITY OF CASTING OPERATIONS EACH PRODUCING IN A SINGLE CAST ONE OR MORE CASTINGS EACH IDENTICAL WITH A CASTING OF EVERY OTHER OPERATION, COMPRISING IN EACH CASTING OPERATION MAKING A METAL MOLD OF SUCH THERMAL DIFFUSIVITY AND MASS AS TO MAINTAIN ITS INTEGRITY TO THE POINT OF FREEZING TO SHAPE OF METAL TO BE CAST THEREIN, CASTING SAID METAL IN SAID MOLD, AND EXPENDING SAID MOLD IN SAID CASTING OPERATION TO FREE THE RUN OF CASTINGS FROM DEPENDENCY FOR PRECISENESS UPON ANY LIFE OF A MOLD BEYOND THE OPERATION IN WHICH IT IS EXPENDED.
References Cited (Backward Citations)
US1000470A
Cited
US1561287A
Cited
US2759231A
Cited
US2771650A
Cited
US2777166A
Cited
US3085302A
Cited
US2813319A
Cited
US2978765A
Cited
US3110944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |