US3042982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expendible moulds for patterns in precision casting
Assignee: ROILS ROYCE Ltd
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Filing: 1959-06-24
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Granted: 1962-07-10
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Expires: 1979-06-24
Abstract
No abstract record available.
Inventors
- 👤 Mountford Norman Duncan Gerard
- 👤 Morley Charles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:56
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
THE METHOD OF MAKING AN EXPENDIBLE WAX PATTERN FOR USE IN THE PRECISION CASTING OF METALS COMPRISING FORMING A MOULD AROUND A MODEL OF THE ARTICLE, SAID MOULD BEING FORMED FROM A COMPOSITION CONSISTING ESSENTIALLY OF SODIUM CARBOXY METHYL SILICATE, SODIUM, CARBONATE, A REFRACTORY AND SODIUM SILICATE SOLUTION CAPABLE OF BEING HARDENED SUFFICIENTLY FOR USE SOLELY BY THE APPLICATION OF CARBON DIOXIDE AND BEING DISPERSIBLE BY WATER WITHOUT FURTHER TREATMENT, HARDENING THE MOULD SO FORMED SOLELY BY THE APPLICATION OF CARBON DIOXIDE ,, REMOVING THE MODEL FROM THE MOULD, COATING THE INTERIOR OF THE MOULD TO RENDER IT IMPERVIOUS TO WAX, CASTING AN EXPENDIBLE WAX PATTERN IN THE MOULD AND REMOVING THE MOULD FROM THE FRAGILE PATTERN SO PRODUCED BY DISPERSING THE MOULD MATERIAL WITH WATER.
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |