US3175258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell mold method and apparatus
Assignee: British Industries Corp
•
Filing: 1962-12-26
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Granted: 1965-03-30
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Douglas P Rohrer
- 👤 Irwin J Lubalin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
B; B22; B22C; B22C13/00; B22C13/08; B22C23/00; Y; Y10; Y10S; Y10S425/00; Y10S425/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A COMPOSITE MOLD INCLUDING A COPE MEMBER AND A DRAG MEMBER WHICH FORM IN A CLOSED POSITION A MOLD CAVITY, AND WHICH MOLD IS CHARACTERIZED BY AT LEAST ONE EJECTOR CHANNEL HAVING A ONE END OPENING INTO THE MOLD CAVITY, THE METHOD OF INHIBITING THE FLOWING OF MOLDING MATERIAL INTO THE EJECTOR CHANNEL WHICH METHOD COMPRISES: INTRODUCING A MOLDING MATERIAL INTO THE MOLD CAVITY TO FORM A SHEEL MOLD; AND PROVIDING SUFFICIENT FLUID PRESSURE WITHIN THE EJECTOR CHANNEL AND MOLD CAVITY TO PREVENT THE INTRODUCTION OF THE MOLDING MATERIAL INTO THE ONE END OF THE CHANNEL.
Claim 2
Dependent Claim
97 words
IN A COMPOSITE MOLD INCLUDING A COPE MEMBER AND A DRAG MEMBER WHICH FORM IN A CLOSED POSITION A MOLD CAVITY, AND WHICH MOLD IS CHARACTERIZED BY AT LEAST ONE EJECTOR CHANNEL HAVING A ONE END OPENING INTO THE MOLD CAVITY, THE METHOD OF INHIBITING THE FLOWING OF MOLDING MATERIAL INTO THE EJECTOR CHANNEL WHICH METHOD COMPRISES: INTRODUCING A MOLDING MATERIAL INTO THE MOLD CAVITY TO FORM A SHEEL MOLD; AND PROVIDING SUFFICIENT FLUID PRESSURE WITHIN THE EJECTOR CHANNEL AND MOLD CAVITY TO PREVENT THE INTRODUCTION OF THE MOLDING MATERIAL INTO THE ONE END OF THE CHANNEL.
References Cited (Backward Citations)
US2230778A
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US2497098A
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US2629897A
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US2843896A
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US2923040A
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US3050807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |