Patent US3555874A successfully refreshed from Google Patents.
US3555874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool arrangement for the production of impact extruded articles
Assignee: F B HATEBUR AG
•
Filing: 1968-03-28
•
Granted: 1971-01-19
•
Expires: 1988-03-28
Abstract
Abstract THE SPECIFICATION PROVIDES A PUNCH AND DIE FOR THE IMPACT EXTRUSION OF ARTICLES OF PARTLY REDUCED CROSSSECTION IN WHICH BOTH THE PUNCH AND DIE ARE PROVIDED WITH AXIALLY ALIGNED BORES IN WHICH EJECTORS CAN RECIPROCATE. THE EJECTORS ARE INITIALLY RETRACTED FROM THE FACING SURFACES OF THE PUNCH AND DIE SO THAT CAVITIES ARE FORMED IN EACH, THE SLUG BEING INSETRED IN THE LARGER CROSS-SECTION OF THESE TWO CAVITIES. AFTER DEFORMATION OF THE SLUG THE TWO EJECTORS OPERATE TO RELEASE THE FINISHED ARTICLE.
Inventors
- 👤 Hans Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/06; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/14; B21C35/00; B21C35/02; B21J13/00; B21J13/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |