Patent US2979790A successfully refreshed from Google Patents.
US2979790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molds
Assignee: Shaw Process Dev Corp
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Filing: 1957-08-09
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Granted: 1961-04-18
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Irwin J Lubalin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:38
CPC Classifications
B; B22; B22C; B22C9/00; B22C1/00; B22C1/16; B22C1/20; B22C1/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A MOLD FORM COMPRISING AN UNCOMPACTED GELLED SLURRY COMPRISING COMMINUTED REFRACTORY AND AN ALKYL SILICATE BINDER CONTAINING A VOLATILE MATERIAL, THE ENTIRE EXTERNAL SURFACE OF THE SAID MOLD FORM HAVING THEREON A FILM OF WAX, WHEREBY THE EVAPORATION OF VOLATILE MATERIALS CONTAINED WITHIN THE MOLD FORM IS RETARDED PRIOR TO THE IGNITION THEREOF.
Claim 2
Dependent Claim
53 words
A MOLD FORM COMPRISING AN UNCOMPACTED GELLED SLURRY COMPRISING COMMINUTED REFRACTORY AND AN ALKYL SILICATE BINDER CONTAINING A VOLATILE MATERIAL, THE ENTIRE EXTERNAL SURFACE OF THE SAID MOLD FORM HAVING THEREON A FILM OF WAX, WHEREBY THE EVAPORATION OF VOLATILE MATERIALS CONTAINED WITHIN THE MOLD FORM IS RETARDED PRIOR TO THE IGNITION THEREOF.
References Cited (Backward Citations)
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US1292964A
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US2045913A
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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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |