US3166808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core reinforcement means
Assignee: PPG Industries Inc
•
Filing: 1958-08-18
•
Granted: 1965-01-26
•
Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Francis C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10; B22C9/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE METHOD OF CASTING METAL COMPRISING POURING MOLTEN METAL INTO A MOLD AND AROUND A RIGID SAND CORE, COOLING THE METAL IN THE MOLD TO FORM A CASTING HAVING A HOLLOW PORTION IN ITS CORRESPONDING TO THE SHAPE OF THE SAND CORE AND SHAKING THE CASTING TO DISINTEGRATE THE CORE AND PERMIT IT TO BE READILY REMOVED FROM WITHIN THE HOLLOW PORTION OF THE CASTING, THE IMPROVEMENT WHICH COMPRISES USING A CORE HAVING STRAIGHT GLASS FIBERS DISTRIBUTED IN IT TO REINFORCE IT AND MAINTAIN ITS SHAPE DURING THE CASING, SAID GLASS FIBERS BEING CAPABLE OF BREAKING UP INTO SMALL PORTIONS ALONG WITH THE CORE DURING THE SHAKING STEP.
Claim 2
Dependent Claim
109 words
IN THE METHOD OF CASTING METAL COMPRISING POURING MOLTEN METAL INTO A MOLD AND AROUND A RIGID SAND CORE, COOLING THE METAL IN THE MOLD TO FORM A CASTING HAVING A HOLLOW PORTION IN ITS CORRESPONDING TO THE SHAPE OF THE SAND CORE AND SHAKING THE CASTING TO DISINTEGRATE THE CORE AND PERMIT IT TO BE READILY REMOVED FROM WITHIN THE HOLLOW PORTION OF THE CASTING, THE IMPROVEMENT WHICH COMPRISES USING A CORE HAVING STRAIGHT GLASS FIBERS DISTRIBUTED IN IT TO REINFORCE IT AND MAINTAIN ITS SHAPE DURING THE CASING, SAID GLASS FIBERS BEING CAPABLE OF BREAKING UP INTO SMALL PORTIONS ALONG WITH THE CORE DURING THE SHAKING STEP.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |