US2861307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell molds
Assignee: Motors Liquidation Co
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Filing: 1956-01-10
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Granted: 1958-11-25
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Expires: 1976-01-10
Abstract
No abstract record available.
Inventors
- 👤 Charles F Froberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:20
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2206; B22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SAND-RESIN MOLD FOR USE IN SHELL MOLDING OPERATIONS, SAID MOLD BEING FORMED FROM A DRY MIXTURE COMPRISING APPROXIMATELY 3% TO 20% BY WEIGHT OF SILICA FLOUR, 2% TO 15% BY WEIGHT OF A MIXTURE OF THERMOSETTING AND THERMOPLASTIC BINDERS, AND THE BALANCE SUBSTANTIALLY ALL SAND, SAID THERMOSETTING BINDER CONSTITUTING AT LEAST 60% BY WEIGHT OF THE TOTAL BINDER CONTENT, SAID THERMOPLASTIC BINDER BEING A RESIDUE FRACTION RESULTING FROM DISTILATION OF PETROLEUM AND BEING SUBSTANTIALLY FREE OF METHOXYL AND HYDROXYL GROUPS.
Claim 2
Dependent Claim
81 words
A SAND-RESIN MOLD FOR USE IN SHELL MOLDING OPERATIONS, SAID MOLD BEING FORMED FROM A DRY MIXTURE COMPRISING APPROXIMATELY 3% TO 20% BY WEIGHT OF SILICA FLOUR, 2% TO 15% BY WEIGHT OF A MIXTURE OF THERMOSETTING AND THERMOPLASTIC BINDERS, AND THE BALANCE SUBSTANTIALLY ALL SAND, SAID THERMOSETTING BINDER CONSTITUTING AT LEAST 60% BY WEIGHT OF THE TOTAL BINDER CONTENT, SAID THERMOPLASTIC BINDER BEING A RESIDUE FRACTION RESULTING FROM DISTILATION OF PETROLEUM AND BEING SUBSTANTIALLY FREE OF METHOXYL AND HYDROXYL GROUPS.
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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |