US3265348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold purging apparatus and method
Assignee: Individual
•
Filing: 1964-11-23
•
Granted: 1966-08-09
•
Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Edmund Q Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:29
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04; B22D17/00; B22D17/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF CASTING IN CONJUNCTION WITH MOLD MEANS HAVING A CAVITY AND A DOWNWARDLY OPENING PASSAGE COMMUNICATING WITH THE CAVITY, COMPRISING CLOSING THE BOTTOM OPEN END OF THE PASSAGE WITH A DISINTEGRATEABLE CLOSURE, INTRODUCING INERT GAS INTO SAID PASSAGE FROM THE BOTTOM OF THE PASSAGE ABOVE SAID CLOSURE AND CONTINUING THE INTRODUCTION OF THE INERT GAS SUFFICIENTLY TO FILL THE PASSAGE AND CAVITY AND AT A RATE OF FLOW SUFFICIENTLY LOW TO ELIMINATE TURBULENCE AND MIXTURE BETWEEN THE INERT GAS AND AIR, AND POURING MOLTEN CASTING MATERIAL INTO THE MOLD BY POURING IT AGAINST THE DISINTEGRATEABLE CLOSURE AND THEREBY DISINTEGRATING IT, AND CONTINUING THE POURING STEP UNTIL THE MOLD IS FILLED.
References Cited (Backward Citations)
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Cited
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |