US3307957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and compositions for making molds and cores
Assignee: Individual
•
Filing: 1965-10-05
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Granted: 1967-03-07
•
Expires: 1985-10-05
Abstract
No abstract record available.
Inventors
- 👤 Tobler August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:57
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A COMPOSITION FOR MAKING FOUNDRY CORES AND MOLDS CONSISTING ESSENTIALLY OF FOUNDRY SAND ADMIXED WITH A BINDER MADE UP OF ABOUT 3 TO 8 PARTS BY WEIGHT OF PORTLAND CEMENT AND 2 TO 5 PARTS BY WEIGHT OF A MIXTURE OF 40 TO 80% MOLASSES, 5 TO 35% OF THE REACTION PRODUCT OF THE DISINTEGRATION OF STARCH BY REACTION AT A TEMPERATURE BETWEEN ABOUT 65* TO 125* FOR A TIME PERIOD BETWEEN ABOUT 1 1/2 AND 10 HOURS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF ORGANIC ACIDS, MATERIALS CARRYING A PEROXIDE GROUP AND MIXTURES THEREOF AND SUFFICIENT WATER TO MAKE A FORMABLE MASS.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |