Patent US610698A successfully refreshed from Google Patents.
Patent US2834741A successfully refreshed from Google Patents.
US2834741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand coating
Assignee: Ford Motor Co
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Filing: 1954-05-12
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Granted: 1958-05-13
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Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Julius M Bleuenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; B22C1/2293; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2998; Y10T428/31504; Y10T428/31942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE PROCESS OF PRPARING A SAND SUITABLE FOR USE IN SHELL MOLDING COMPRISING AGITATING TOGETHER VINSOL COMPRISING A DARK COLORED, HARD, PINE RESIN WHICH IS SUBSTANTIALLY INSOLUBLE IN PETROLEUM HYDROCARBONS AND WHICH HAS A METHOXY CONTENT OF 3 TO 7 PERCENT AND SAND HEATED TO A TEMPERATURE OF 300 TO 500*F. UNTIL THE VINSOL HAS MELTED AND COATED EACH SAND GRAIN, EXPOSING THE HEATED AND VINSOL COATED GRAINS TO HEXAMETHYLENETETRAMINE TO PRODUCE A HIGHER MELTING RESIN, PERMITTING THIS REACTION TO OCCUR, AT LEAST PARTIALLY COOLING THE RESIN COATED SAND AND AGITATING THE COOLED SAND WITH A HEAT SETTABLE RESIN.
Claim 2
Dependent Claim
99 words
THE PROCESS OF PRPARING A SAND SUITABLE FOR USE IN SHELL MOLDING COMPRISING AGITATING TOGETHER VINSOL COMPRISING A DARK COLORED, HARD, PINE RESIN WHICH IS SUBSTANTIALLY INSOLUBLE IN PETROLEUM HYDROCARBONS AND WHICH HAS A METHOXY CONTENT OF 3 TO 7 PERCENT AND SAND HEATED TO A TEMPERATURE OF 300 TO 500*F. UNTIL THE VINSOL HAS MELTED AND COATED EACH SAND GRAIN, EXPOSING THE HEATED AND VINSOL COATED GRAINS TO HEXAMETHYLENETETRAMINE TO PRODUCE A HIGHER MELTING RESIN, PERMITTING THIS REACTION TO OCCUR, AT LEAST PARTIALLY COOLING THE RESIN COATED SAND AND AGITATING THE COOLED SAND WITH A HEAT SETTABLE RESIN.
References Cited (Backward Citations)
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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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |