US2853754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous hollow casting
Assignee: Dow Chemical Co
•
Filing: 1957-07-17
•
Granted: 1958-09-30
•
Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Richard K Paddock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:22
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF PRODUCING A SOUND TUBULAR HEAVY WALLED INGOT CONTINUOUSLY OF A MAGNESIUM, WHICH COMPRISES TAINING AT LEAST 85 PERCENT OF MAGNESIUM, WHICH COMPRISES DELIVERING THE MOLTEN MAGNESIUM-BASE ALLOY TO A VERTICALLY DISPOSED OPEN ENDED COOLED MOLD HAVING A CENTRALLY DISPOSED MANDREL THEREIN AT A RATE SUFFICIENT TO FILL THE MOLD TO A DEPTH OF FROM 2 TO 4 INCHES PER MINUTE WHEN CLOSED AT THE BOTTOM COOLING THE OUTSIDE OF THE MOLD AND THE INSIDE OF THE MANDREL AT A RATE SUCH THAT THE LOWERMOST PORTION OF THE RESULTING INTERFACE BETWEEN THE MOLTEN AND SOLIDIFIED METAL IN THE MOLD IS AT A DISTANCE FROM THE MANDREL OF 1/8 TO 3/8 OF THE WALL THICKNESS OF THE INGOT WHILE WITHDRAWING INGOT FROM BELOW THE MOLD AT A RATE SUFFICIENT TO MAINTAIN THE MOLD SEALED AGAINST LEAKAGE OF MOLTEN METAL AND THE UPPERMOST PORTION OF THE INTERFACE BELOW THE UPPER SURFACE OF THE MOLTEN METAL IN THE MOLD.
Claim 2
Independent Claim
158 words
THE METHOD OF PRODUCING A SOUND TUBULAR HEAVY WALLED INGOT CONTINUOUSLY OF A MAGNESIUM, WHICH COMPRISES TAINING AT LEAST 85 PERCENT OF MAGNESIUM, WHICH COMPRISES DELIVERING THE MOLTEN MAGNESIUM-BASE ALLOY TO A VERTICALLY DISPOSED OPEN ENDED COOLED MOLD HAVING A CENTRALLY DISPOSED MANDREL THEREIN AT A RATE SUFFICIENT TO FILL THE MOLD TO A DEPTH OF FROM 2 TO 4 INCHES PER MINUTE WHEN CLOSED AT THE BOTTOM COOLING THE OUTSIDE OF THE MOLD AND THE INSIDE OF THE MANDREL AT A RATE SUCH THAT THE LOWERMOST PORTION OF THE RESULTING INTERFACE BETWEEN THE MOLTEN AND SOLIDIFIED METAL IN THE MOLD IS AT A DISTANCE FROM THE MANDREL OF 1/8 TO 3/8 OF THE WALL THICKNESS OF THE INGOT WHILE WITHDRAWING INGOT FROM BELOW THE MOLD AT A RATE SUFFICIENT TO MAINTAIN THE MOLD SEALED AGAINST LEAKAGE OF MOLTEN METAL AND THE UPPERMOST PORTION OF THE INTERFACE BELOW THE UPPER SURFACE OF THE MOLTEN METAL IN THE MOLD.
References Cited (Backward Citations)
US2225415A
Cited
US2473221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |