US3174200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purging mold and pouring metal therein
Assignee: Union Carbide Corp
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Filing: 1961-06-15
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Granted: 1965-03-23
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Expires: 1981-06-15
Abstract
No abstract record available.
Inventors
- 👤 Leo F Keel
- 👤 Maurice F Hoffman
- 👤 Ronald J Mccullough
- 👤 Peter A Mccormack
- 👤 Ronald L W Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:47
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
IN A METHOD OF CASTING METAL WHEREIN THE MOLD INTO WHICH THE METAL IS TO BE POURED IS PURGED OF ITS RESIDUAL GAS BY THE INTRODUCTON OF A NON-OXIDIZING PURGING GAS, PRIOR TO THE POURING OF THE METAL THEREINTO, THE IMPROVEMENT WHICH COMPRISES FASTENING A METALLIC FOIL SHEET HAVING AN APERTURE THERETHROUGH ACROSS THE OPENING OF SAID MOLD TO PROVIDE A SUBSTANTIAL CLOSURE THEREOF, INTRODUCING THE NON-OXIDIZING PURGE GAS TO THE MOLD TO PURGE OIT OF ITS RESIDUAL GAS, AND THEREAFTER POURING THE MOLTEN METAL THROUGH THE METALLIC FOIL CLOSURE AND INTO THE MOLD WHEREBY SAID CLOSURE WILL BE MELTED AWAY BY SAID MOLTEN METAL.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |