US3594343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic-urea hot box resin system
Assignee: Monsanto Co
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Filing: 1967-09-12
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Granted: 1971-07-20
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Expires: 1987-09-12
Abstract
Abstract A LIQUID PHENOLIC-UREA RESINAND CATALYST SYSTEM WHICH HAS IMPROVED BENCH LIFE AND LOW FORMALDEHYDE EVOLUTION DURING THERMOSETTING. THE SYSTEM IS ESPECIALLY USEFUL IN FOUNDRIES FOR THE PRODUCTION OF SAND CORES AT AN EXTREMELY RAPID RATE.
Inventors
- 👤 Rodney M Huck
- 👤 Joel M Schnur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:54
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; C; C08; C08L; C08L61/00; C08L61/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |