US3120038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure permanent molding
Assignee: Cast Forge Corp
•
Filing: 1962-08-29
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Granted: 1964-02-04
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Expires: 1982-08-29
Abstract
No abstract record available.
Inventors
- 👤 Lauth Corliss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:38
CPC Classifications
B; B22; B22D; B22D17/00; B22D18/00; B22D18/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
IN AN APPARATUS FOR PERMANENT MOLD CASTING OF METALS SUSCEPTIBLE TO SUBSTANTIAL SOLIDIFICATION SHRINKAGE IN TRANSITION FROM A MOLTEN STATE TO A SOLID STATE, MEANS OPERABLE TO DEFINE A CLOSED CHAMBER HAVING A MOLD CAVITY OF FIXED VOLUME AND HAVING END FACES, ONE OF SAID FACES BEING IN FREE AND OPEN COMMUNICATION WITH A RESERVOIR AND SAID CAVITY ALSO BEING IN COMMUNICATION WITH A SECOND CHAMBER VIA A RESTRICTED PASSAGE, A PISTON MOVABLE FROM A NORMALLY MAINTAINED FIRST POSITION INTO SAID RESERVOIR TO REDUCE THE VOLUME OF SAID RESERVOIR, FIRST HYDRAULIC MOTOR MEANS OPERABLE WHEN SAID PISTON IS IN SAID NORMALLY MAINTAINED FIRST POSITION TO DISPLACE MOLTEN METAL IN SAID CLOSED CHAMBER TO COMPLETELY FILL SAID CAVITY, RESERVOIR
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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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |