US3796583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making foundry molds
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1970-09-17
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Granted: 1974-03-12
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Expires: 1990-09-17
Abstract
Abstract MOLDS FOR USE IN METAL CASTING ARE PROVIDED BY MIXING A MAJOR PORTION OR A PARTICULATE REFRACTORY MATERIAL WITH A MINOR AMOUNT OF A BINDER WHICH CONSISTS ESSENTIALLY OF COAL TAR, A POLYIISOCYANATE AND A CATALYST, SUCH AS AN AMINE. SUCH A MIXTURE OF REFRACTORY MATERIAL AND BINDER WILL AIR-SET AT AMBIENT TEMPERATURES TO GIVE A SATISFACTORY MOLD OR CORE. FUTHERMORE, IF THERE IS ADDED TO THE BINDER COMPOSITION A DEEP-SET PROMOTING AGENT, SUCH AS AN EPOXIDE OR POLYOL, THE MOLD WILL SET EVEN MORE UNIFORMLY AND RAPIDLY THROUGHOUT ITS CROSS-SECTION.
Inventors
- 👤 J Bungs
- 👤 N Stillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:47
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2273; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/542; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |