Patent US2818619A successfully refreshed from Google Patents.
US2818619A
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Refractory mold, method of making same and composition therefor
Assignee: Motors Liquidation Co
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Filing: 1957-01-31
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Granted: 1958-01-07
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Expires: 1977-01-31
Abstract
No abstract record available.
Inventors
- 👤 James P Bradley
- 👤 Robert R Dohrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:34
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A MOLD COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ETHYL SILICATE SOLUTION AND A GROG COMPRISING, BY WEIGHT, APPROXIMATELY 65% TO 90% OF A PULVERIZED FIRE CLAY, 9% TO 34% OF A FINELY COMMINUTED REFRACTORY MATERIAL, A SMALL BUT EFFECTIVE AMOUNT OF BORAX GLASS NOT IN EXCESS OF 2%, AND 0.15% TO 1.5% OF A SETTING ACCELERATOR FOR THE ETHYL SILICATE SOLUTION.
Claim 2
Dependent Claim
63 words
A MOLD COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ETHYL SILICATE SOLUTION AND A GROG COMPRISING, BY WEIGHT, APPROXIMATELY 65% TO 90% OF A PULVERIZED FIRE CLAY, 9% TO 34% OF A FINELY COMMINUTED REFRACTORY MATERIAL, A SMALL BUT EFFECTIVE AMOUNT OF BORAX GLASS NOT IN EXCESS OF 2%, AND 0.15% TO 1.5% OF A SETTING ACCELERATOR FOR THE ETHYL SILICATE SOLUTION.
References Cited (Backward Citations)
GB190600074A
Cited
US2027932A
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US2333430A
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GB585665A
Cited
US2441695A
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GB641187A
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US2568364A
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |