US3131999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusible salt pattern composition and process of making molds
Assignee: Nippon Steel Corp
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Filing: 1960-03-09
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Granted: 1964-05-05
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Suzuki Kazuro
- 👤 Hiraiwa Osamu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF PRECISION CASTING MOLDS COMPRISING MIXING 60 TO 80% BY WEIGHT OF CRYSTALLINE SODIUM ACETATE AND 20 TO 40% BY WEIGHT OF ANHYDROUS SODIUM CARBONATE, POURING THE THUSLY OBTAINED MIXTURE INTO A METALLIC MOLD AND SOLIDIFYING THE MIXTURE TO FORM A PATTERN CORRESPONDING IN SHAPE TO THAT OF THE MOLD, REMOVING THE PATTERN FROM THE MOLD AND COATING THE PATTERN WITH A REFRACTORY SHELL, AND DISSOLVING SAID PATTERN TO LEAVE THE REFRACTORY SHELL IN THE FORM OF THE MOLD.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |