US3632844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-sticking sand mix for foundry cores
Assignee: Ashland LLC
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Filing: 1969-03-10
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Granted: 1972-01-04
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Expires: 1989-03-10
Abstract
Abstract SHAPED FOUNDRY PRODUCTS, E.G., CORES, WHICH ARE MADE FROM SAND AND A PHENOLIC RESIN-ISOCYANATE BINDER ARE RENDERED NON-STICKING BY ADDING FATTY ACID TO THE SANDBINDER MIX.
Inventors
- 👤 Janis Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/542; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/24; C08K; C08K5/00; C08K5/04; C08K5/09
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |