US3259949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting method
Assignee: Meehanite Metal Corp
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Filing: 1964-01-16
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Granted: 1966-07-12
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 William H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C9/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF MAKING A METAL SHAPE COMPRISING THE STEPS OF SELECTING A CONSUMABLE PLASTIC PATTERN HAVING A MATERIAL OF CONSTRUCTION SELECTED FROM THE GROUP CONSISTING OF EXPANDED POLYSTYRENE AND POLYETHYLENE RESINS, RAMMING SAND AROUND SAID PATTERN, INTRODUCING AN INERT GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN, AND ARGON AT A TEMPERATURE IN EXCESS OF 500*F., SAID GAS IMPINGING DIRECTLY ON SAID PATTERN, THEREBY SUBSTANTIALLY VOLATILIZING SAID MATERIAL OF CONSTRUCTION IN THE SUBSTANTIAL ABSENCE OF OXYGEN WITH SUBSEQUENT PASSING OF SAME FROM ITS POSITION IN THE SAND AND THEREAFTER POURING MOLTEN METAL INTO THE RESULTANT CAVITY.
Claim 2
Independent Claim
99 words
THE METHOD OF MAKING A METAL SHAPE COMPRISING THE STEPS OF SELECTING A CONSUMABLE PLASTIC PATTERN HAVING A MATERIAL OF CONSTRUCTION SELECTED FROM THE GROUP CONSISTING OF EXPANDED POLYSTYRENE AND POLYETHYLENE RESINS, RAMMING SAND AROUND SAID PATTERN, INTRODUCING AN INERT GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN, AND ARGON AT A TEMPERATURE IN EXCESS OF 500*F., SAID GAS IMPINGING DIRECTLY ON SAID PATTERN, THEREBY SUBSTANTIALLY VOLATILIZING SAID MATERIAL OF CONSTRUCTION IN THE SUBSTANTIAL ABSENCE OF OXYGEN WITH SUBSEQUENT PASSING OF SAME FROM ITS POSITION IN THE SAND AND THEREAFTER POURING MOLTEN METAL INTO THE RESULTANT CAVITY.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |