Patent US2947641A successfully refreshed from Google Patents.
US2947641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell molding material and process
Assignee: Ford Motor Co
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Filing: 1958-11-03
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Granted: 1960-08-02
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Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Julius M Bleuenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/186; B22C1/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A DRY, PULVERULENT, READILY FLOWABLE SHELL MOLDING MATERIAL CONSISTING ESSENTIALLY OF A GRANULAR REFRACTORY MATERIAL ADMIXED WITH A SMALL BUT EFFECTIVE AMOUNT OF A HYDRATED SILICATE OF AN ALKALI METAL, SAID ALKALI METAL HYDRATED SILICATE EXHIBITING A MELTING POINT NOT SUBSTANTIALLY ABOVE THAT OF K2O.2SI02-H2O.
Claim 2
Dependent Claim
45 words
A DRY, PULVERULENT, READILY FLOWABLE SHELL MOLDING MATERIAL CONSISTING ESSENTIALLY OF A GRANULAR REFRACTORY MATERIAL ADMIXED WITH A SMALL BUT EFFECTIVE AMOUNT OF A HYDRATED SILICATE OF AN ALKALI METAL, SAID ALKALI METAL HYDRATED SILICATE EXHIBITING A MELTING POINT NOT SUBSTANTIALLY ABOVE THAT OF K2O.2SI02-H2O.
References Cited (Backward Citations)
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US1976009A
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US2378927A
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US2292199A
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US2701902A
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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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |