US3344636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion of metals
Assignee: Council of Scientific and Industrial Research
•
Filing: 1964-04-03
•
Granted: 1967-10-03
•
Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Hubert L D Pugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:00
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/007; B21C23/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
HYDROSTATIC EXTRUSION PROCESS WHICH COMPRISES INSERTING A NON-STRAIGHT BILLET INTO A HYDROSTATIC PRESSURE CHAMBER; SEALING EXTRUSION DIES INTO OPPOSITE ENDS OF SAID CHAMBER; INSERTING EACH END OF SAID BILLET IN FLUID-TIGHT MANNER INTO THE ADJACENT DIE, AND ESTABLISHING A HIGH HYDROSTATIC PRESSURE IN SAID CHAMBER BETWEEN SAID DIES WHILE MAINTAINING A LOWER PRESSURE IN A CHAMBER ON THE OUTLET SIDE OF EACH OF SAID DIES WHEREBY TO CAUSE EXTRUSION OF THE OPPOSITE ENDS OF SAID BILLET THROUGH THE RESPECTIVE DIES.
Claim 2
Dependent Claim
80 words
HYDROSTATIC EXTRUSION PROCESS WHICH COMPRISES INSERTING A NON-STRAIGHT BILLET INTO A HYDROSTATIC PRESSURE CHAMBER; SEALING EXTRUSION DIES INTO OPPOSITE ENDS OF SAID CHAMBER; INSERTING EACH END OF SAID BILLET IN FLUID-TIGHT MANNER INTO THE ADJACENT DIE, AND ESTABLISHING A HIGH HYDROSTATIC PRESSURE IN SAID CHAMBER BETWEEN SAID DIES WHILE MAINTAINING A LOWER PRESSURE IN A CHAMBER ON THE OUTLET SIDE OF EACH OF SAID DIES WHEREBY TO CAUSE EXTRUSION OF THE OPPOSITE ENDS OF SAID BILLET THROUGH THE RESPECTIVE DIES.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |