US3050797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water sensitive molds and cores of fast collapsibility
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-06-18
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Granted: 1962-08-28
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Expires: 1979-06-18
Abstract
No abstract record available.
Inventors
- 👤 Freedman Bernard
- 👤 Jerome J Mestdagh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:51
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR PRODUCING DRY SAND MOLDS AND CORES CAPABLE OF EXHIBITING FAST COLLAPISIBILITY WHEN USED IN METAL CASTING OPERATIONS THE SAID PROCESS CONSISTING OF THE STEPS OF (A) SHAPING MOLDS AND CORES FROM A SAND-RESIN MIXTURE, THE RESIN CONSISTING ESSENTIALLY OF A WATER-DILUTABLE LIQUID CONDENSATE IN MOL RATIO OF 1-3 MOLS OF ALDEHYDE PER MOL OF PHENOL, SAID CONDENSATE RESULTING FROM A CONDENSATION REACTION CARRIED OUT AT A TEMPERATURE OF 60100* C. AND AT A PH OF 8.0-11.0 UNTIL THE REACTION MIXTURE HAS A WATER DILUTABILITY OF FROM 1:1 TO 24:1 AND THEREAFTER READJUSTED TO A PH OF 6.0-8.5 BY THE ADDITION OF ABORIC ACID, THEN (B) SETTING THE SHAPED MOLDS AND CORES BY CURING THE RESIN TO A POINT WHEREIN IT HAS WATERSENSITIVITY.
Claim 2
Dependent Claim
125 words
A PROCESS FOR PRODUCING DRY SAND MOLDS AND CORES CAPABLE OF EXHIBITING FAST COLLAPISIBILITY WHEN USED IN METAL CASTING OPERATIONS THE SAID PROCESS CONSISTING OF THE STEPS OF (A) SHAPING MOLDS AND CORES FROM A SAND-RESIN MIXTURE, THE RESIN CONSISTING ESSENTIALLY OF A WATER-DILUTABLE LIQUID CONDENSATE IN MOL RATIO OF 1-3 MOLS OF ALDEHYDE PER MOL OF PHENOL, SAID CONDENSATE RESULTING FROM A CONDENSATION REACTION CARRIED OUT AT A TEMPERATURE OF 60100* C. AND AT A PH OF 8.0-11.0 UNTIL THE REACTION MIXTURE HAS A WATER DILUTABILITY OF FROM 1:1 TO 24:1 AND THEREAFTER READJUSTED TO A PH OF 6.0-8.5 BY THE ADDITION OF ABORIC ACID, THEN (B) SETTING THE SHAPED MOLDS AND CORES BY CURING THE RESIN TO A POINT WHEREIN IT HAS WATERSENSITIVITY.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |