Patent US5452315A successfully refreshed from Google Patents.
Patent US3216233A successfully refreshed from Google Patents.
US3216233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Press for extruding easily oxidising metal billets
Assignee: Schloemann AG
•
Filing: 1964-11-16
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Granted: 1965-11-09
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Pischel Hans
- 👤 Zilges Franz-Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:05
CPC Classifications
B; B21; B21C; B21C35/00; B21C35/02; B21C23/00; B21C23/009; B21C23/21; B21C27/00; B21C27/04; B21C29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF EXTRUDING BILLETS PROVIDED WITH LATERAL HOLDING PROJECTIONS AT THE UPPER END, IN A VERTICAL EXTRUSION PRESS PROVIDED WITH A HOLLOW ELECTRICAL HEATING DEVICE MOUNTED ON THE CONTAINER OF THE PRESS, AND AN EXTRUSION DIE, SAID METHOD COMPRISING THE STEPS OF: RETRACTING THE PRESS RAM, INSERTING A BILLET TO BE EXTRUDED IN THE HEATING DEVICE WITH ITS LATERAL HOLDING PROJECTIONS RESTING ON AND SUPPORTED BY THE EDGE OF THE HOLLOW THEREIN, SUPPLYING ELECTRIC CURRENT TO THE HEATING DEVICE FOR A LONG ENOUGH TIME TO ENABLE THE HEATING DEVICE TO HEAT THE BILLET UP TO AN APPROPRIATE TEMPERATURE, AND ADVANCING THE PRESS RAM SO AS TO SHEAR OFF THE LATERAL HOLDING PROJEC-
Claim 2
Independent Claim
113 words
A METHOD OF EXTRUDING BILLETS PROVIDED WITH LATERAL HOLDING PROJECTIONS AT THE UPPER END, IN A VERTICAL EXTRUSION PRESS PROVIDED WITH A HOLLOW ELECTRICAL HEATING DEVICE MOUNTED ON THE CONTAINER OF THE PRESS, AND AN EXTRUSION DIE, SAID METHOD COMPRISING THE STEPS OF: RETRACTING THE PRESS RAM, INSERTING A BILLET TO BE EXTRUDED IN THE HEATING DEVICE WITH ITS LATERAL HOLDING PROJECTIONS RESTING ON AND SUPPORTED BY THE EDGE OF THE HOLLOW THEREIN, SUPPLYING ELECTRIC CURRENT TO THE HEATING DEVICE FOR A LONG ENOUGH TIME TO ENABLE THE HEATING DEVICE TO HEAT THE BILLET UP TO AN APPROPRIATE TEMPERATURE, AND ADVANCING THE PRESS RAM SO AS TO SHEAR OFF THE LATERAL HOLDING PROJEC-
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |