Patent CA652825A successfully refreshed from Google Patents.
Patent US3204304A successfully refreshed from Google Patents.
US3204304A
Expired / Lapsed
US
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Die castings and die casting systems
Assignee: WATCHUNG DIE CASTING Corp
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Filing: 1962-08-10
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Granted: 1965-09-07
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Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Kostenko John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
B; B22; B22D; B22D17/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49989; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE DIE CASTING OF METAL WHEREIN MOLTEN METAL IS INJECTED UNDER PRESSURE THROUGH A SLEEVE INTO THE CAVITY OF A COUPLED DIE, THE STEPS COMPRISING SEPARABLY POSITIONING A BARRIER MEMBER OF HIGHER MELTING POINT THAN SAID MOLTEN METAL IS REGISTRY WITH THE OPEN END OF SAID SLEEVE TO DEFINED THEREWITH A RESTRICTED OUTLET PORT, INJECTING MOLTEN METAL UNDER PRESSURE THROUGH SAID RESTRICTED OUTLET PORT INTO SAID DIE CAVITY LEAVING A RESIDUR IN SAID SLEEVE, COOLING AND SOLIDIFYING SAID METAL AND DISENGAGING THE DIE CAST PIECE AND THE RESIDUE AND THE BARRIER MEMBER AS A UNIT FROM SAID SLEEVE, SAID RESIDUE BEING CONNECTED TO SAID DIE CAST PIECE BY A RELATIVELY NARROW BRIDGE DELINEATED BY SAID OUTLET PORT, AND THEREAFTER SEPARATING SAID RESIDUE FROM SAID DIE CAST PIECE ALONG SAID BRIDGE.
Claim 2
Dependent Claim
131 words
IN THE DIE CASTING OF METAL WHEREIN MOLTEN METAL IS INJECTED UNDER PRESSURE THROUGH A SLEEVE INTO THE CAVITY OF A COUPLED DIE, THE STEPS COMPRISING SEPARABLY POSITIONING A BARRIER MEMBER OF HIGHER MELTING POINT THAN SAID MOLTEN METAL IS REGISTRY WITH THE OPEN END OF SAID SLEEVE TO DEFINED THEREWITH A RESTRICTED OUTLET PORT, INJECTING MOLTEN METAL UNDER PRESSURE THROUGH SAID RESTRICTED OUTLET PORT INTO SAID DIE CAVITY LEAVING A RESIDUR IN SAID SLEEVE, COOLING AND SOLIDIFYING SAID METAL AND DISENGAGING THE DIE CAST PIECE AND THE RESIDUE AND THE BARRIER MEMBER AS A UNIT FROM SAID SLEEVE, SAID RESIDUE BEING CONNECTED TO SAID DIE CAST PIECE BY A RELATIVELY NARROW BRIDGE DELINEATED BY SAID OUTLET PORT, AND THEREAFTER SEPARATING SAID RESIDUE FROM SAID DIE CAST PIECE ALONG SAID BRIDGE.
References Cited (Backward Citations)
US1259224A
Cited
US1552274A
Cited
US2612666A
Cited
US2994125A
Cited
US2955335A
Cited
US3079676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |