Patent US3187531A successfully refreshed from Google Patents.
US3187531A
Expired / Lapsed
US
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Extrusion of metals
Assignee: Individual
•
Filing: 1964-05-14
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Granted: 1965-06-08
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Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Cairns John Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:33
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/32; B21C23/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF COMMENCING THE EXTRUSION OF A BILLET COMPRISING THE STEPS OF FORCING SAID BILLET THROUGH A SCALPING DIE IN A PRESS SEPARATE FROM THE EXTRUSION PRESS, SAID SCALPING DIE HAVING A DIAMETER SMALLER THAN THE DIAMETER OF THE EXTRUSION PRESS CONTAINER TO ALLOW FOR A LAYER OF LUBRICANT IN SAID CONTAINER, SCALPING THE LEADING EDGE OF SAID BILLET, PLACING A LAYER OF LUBRICANT IN SAID EXTRUSION PRESS CONTAINER, INSERTING SAID BILLET IN SAID EXTRUSION PRESS CONTAINER, AND COMMENCING EXTRUSION.
Claim 2
Independent Claim
81 words
A METHOD OF COMMENCING THE EXTRUSION OF A BILLET COMPRISING THE STEPS OF FORCING SAID BILLET THROUGH A SCALPING DIE IN A PRESS SEPARATE FROM THE EXTRUSION PRESS, SAID SCALPING DIE HAVING A DIAMETER SMALLER THAN THE DIAMETER OF THE EXTRUSION PRESS CONTAINER TO ALLOW FOR A LAYER OF LUBRICANT IN SAID CONTAINER, SCALPING THE LEADING EDGE OF SAID BILLET, PLACING A LAYER OF LUBRICANT IN SAID EXTRUSION PRESS CONTAINER, INSERTING SAID BILLET IN SAID EXTRUSION PRESS CONTAINER, AND COMMENCING EXTRUSION.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |