US3077648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer shell mold
Assignee: Union Carbide Corp
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Filing: 1960-02-01
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Granted: 1963-02-19
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Frank R Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:59
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A METHOD FOR PREPARING A MULTI-LAYER SHELL MOLD CHARZCTEIZED BY A GOOD COMBINATION OF STRENGTH AND PERMEABILITY AND CAPABLE OF USE WITHOUT SUPPORT COMPRISING PREPARING A FIRST COATING SOLUTION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE INDICATED PROPORTIONS: SODIUM SILICATE SOLUTION, S.G. 1.33 1600 TO 3000 CC. WATER 2400 TO 1000 CC. WETTING AGENT 10 TO 100 CC. DEFORAMING AGENT 5 TO 50 CC. CLAY 50 TO 500 GRAMS. ALUMINA (-325 MESH 15 TO 25 LBS. AND A SECOND COATING SOLUTION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE INDICATED PROPORTIONS: ETHYL SILICATE 19.5 TO 42 LBS. ALCOHOL 42 TO 16 LBS. WATER 1 TO 5 LBS. CONC. HYDROCHLORIC ACID 110 TO 160 LBS. ALUMINA 100 TO 300 CC. WETTING AGENT 100 TO 300 CC. BRO-SILICATE GLASS GRAINS (-35+80)- 5 TO 8 LBS. APPLYING A COATING OF SAID FIRST SOLUTION TO AN EXPENDABLE PATTERN, STUCOING SAID COATED EXPENDABLE PATTERN WITH A GRANULAR REFRACTORY MATERIAL, AND THEREUPON ALTERNATELY APPLYING COATINGS OF SAID SECOND SOLUTION AND STUCCOING WITH A COARSER GRANULAR REFRACTORY MATERIAL TO BUILD UP A SHELL OF SUFFICIENT THICKNESS, AND THEN REMOVING THE EXPENDABLE PATTERN MATERIAL AND FIRING THE RESULTING MULTILAYER SHELL MOLD TO HARDNESS.
Claim 2
Independent Claim
196 words
A METHOD FOR PREPARING A MULTI-LAYER SHELL MOLD CHARZCTEIZED BY A GOOD COMBINATION OF STRENGTH AND PERMEABILITY AND CAPABLE OF USE WITHOUT SUPPORT COMPRISING PREPARING A FIRST COATING SOLUTION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE INDICATED PROPORTIONS: SODIUM SILICATE SOLUTION, S.G. 1.33 1600 TO 3000 CC. WATER 2400 TO 1000 CC. WETTING AGENT 10 TO 100 CC. DEFORAMING AGENT 5 TO 50 CC. CLAY 50 TO 500 GRAMS. ALUMINA (-325 MESH 15 TO 25 LBS. AND A SECOND COATING SOLUTION CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE INDICATED PROPORTIONS: ETHYL SILICATE 19.5 TO 42 LBS. ALCOHOL 42 TO 16 LBS. WATER 1 TO 5 LBS. CONC. HYDROCHLORIC ACID 110 TO 160 LBS. ALUMINA 100 TO 300 CC. WETTING AGENT 100 TO 300 CC. BRO-SILICATE GLASS GRAINS (-35+80)- 5 TO 8 LBS. APPLYING A COATING OF SAID FIRST SOLUTION TO AN EXPENDABLE PATTERN, STUCOING SAID COATED EXPENDABLE PATTERN WITH A GRANULAR REFRACTORY MATERIAL, AND THEREUPON ALTERNATELY APPLYING COATINGS OF SAID SECOND SOLUTION AND STUCCOING WITH A COARSER GRANULAR REFRACTORY MATERIAL TO BUILD UP A SHELL OF SUFFICIENT THICKNESS, AND THEN REMOVING THE EXPENDABLE PATTERN MATERIAL AND FIRING THE RESULTING MULTILAYER SHELL MOLD TO HARDNESS.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |