Patent US3702316A successfully refreshed from Google Patents.
US3702316A
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US
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Cold box method
Assignee: Ashland LLC
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Filing: 1971-01-26
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Granted: 1972-11-07
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Expires: 1991-01-26
Abstract
Abstract AN IMPROVEMENT IN COLD BOX FOUNDRY CORE PRODUCTION METHODS IN WHICH A PHENOLIC/ISOCYANATE BINDER IS CURED WITH AN ORGANIC BASE CATALYST HAVING A PKB VALUE RANGING FROM ABOUT 7-11.
Inventors
- 👤 Janis Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; B22C1/2273; B22C9/00; B22C9/10; B22C9/12; C08G18/18; C08G18/1891; C08G18/28; C08G18/40; C08G18/54; C08G18/542; C08G8/00; C08G8/04; C08G8/08
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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |