US2855646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage method for the casting of fusible materials
Assignee: Individual
•
Filing: 1956-08-23
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Granted: 1958-10-14
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Howard A Fromson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:10
CPC Classifications
C; C22; C22C; C22C1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
175 words
A METHOD FOR THE CASTING OF A METAL WHICH COMPRISES SOLIDIFYING, IN THE FORM OF A PLURALITY OF DISCRETE PARTICLES HAVING A COMPACT FORM AND A LARGEST DIMENSION NOT LARGER THAN ONE-TENTH THE SMALLEST CROSS-SECTIONAL DIMENSION OF THE CASTING BEING PRODUCED AND NOT SMALLER THAN A SIZE WHICH PROVIDES A MASS WHICH WILL OVERCOME THE SURFACE TENSION OF THE FUSED METAL WHEN THE PARTICLE IS GENTLY DEPOSITED THEREON, A PROPORTION WITHIN THE RANGE OF ABOUT 10% BY VOLUME TO ABOUT 50% BY VOLUME OF THE TOTAL QUANTITY OF A FUSED MATERIAL TO BE USED IN THE FORMATION OF A SINGLE CASTING; MIXING IN A CASTING MOLD THE SOLID PARTICLES WHILE AT A TEMPERATURE ABOVE NORMAL ATMOSPHERIC TEMPERATURE, BUT BELOW THEIR FUSING TEMPERATURE WITH THE FUSED MATERIAL WHILE IT IS AT A TEMPERATURE ABOVE ITS FUSION TEMPERATURE, THE SAID TEMPERATURES OF THE SOLID AND LIQUID PHASES BEING SELECTED IN TERMS OF FUSION TEMPERATURE OF THE MATERIAL BEING CAST AND THE PROPORTION OF SOLID MATERIAL PRESENT IN THE SAID MIXTURE TO SATISFY THE REQUIREMENTS OF THE EQUATION:
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |