Patent US2720310A successfully refreshed from Google Patents.
US2720310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion of metal
Assignee: Dow Chemical Co
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Filing: 1950-04-03
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Granted: 1955-10-11
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Waldo A Yack
- 👤 Floyd H Sczepanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:28
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF FORMING SIMULTANEOUSLY A PLURALITY OF STRAIGHT EXTRUSIONS EACH HAVING SUBSTANTIALLY THE SAME CROSS-SECTIONAL CONFIGURATION OF A LIGHT METAL CAPABLE OF PLASTIC DEFORMATION ON BEING HEATED TO A SUITABLE TEMPERATURE, WHICH COMPRISES HEATING AN INGOT OF THE ALLOY TO A TEMPERATURE SUITABLE FOR PLASTIC DEFORMATION; LATERALLY CONFINING THE HEATED INGOT; APPLYING PRESSURE OVER ONE END OF THE LATERALLY CONFINED INGOT SUFFICIENT TO CAUSE PLASTIC FLOW OF INGOT METAL FROM THE OPPOSITE END WHILE RESTRICTING FLOW THEREFROM EXCEPT AT A PLURALITY OF PLACES THEREON EACH HAVING SUBSTANTIALLY THE SAME AREA AND CONFIGURATION SO AS TO PRODUCE A PLURALITY OF EXTRUSIONS; APPLYING A PULL TO EACH EXTRUSION AS IT FORMS; AND PULLING THE BEGINNING END OF EACH EXTRUSION AWAY FROM THE INGOT AT THE SAME RATE WHILE EACH OF THE EXTRUSION ARE FORMING SO THAT EACH EXTRUSION HAS THE SAME LENGTH AS IT FORMS, SAID PULL BEING GREAT ENOUGH TO MAINTAIN EACH EXTRUSION SUBSTANTIALLY STRAIGHT.
Claim 2
Independent Claim
155 words
THE METHOD OF FORMING SIMULTANEOUSLY A PLURALITY OF STRAIGHT EXTRUSIONS EACH HAVING SUBSTANTIALLY THE SAME CROSS-SECTIONAL CONFIGURATION OF A LIGHT METAL CAPABLE OF PLASTIC DEFORMATION ON BEING HEATED TO A SUITABLE TEMPERATURE, WHICH COMPRISES HEATING AN INGOT OF THE ALLOY TO A TEMPERATURE SUITABLE FOR PLASTIC DEFORMATION; LATERALLY CONFINING THE HEATED INGOT; APPLYING PRESSURE OVER ONE END OF THE LATERALLY CONFINED INGOT SUFFICIENT TO CAUSE PLASTIC FLOW OF INGOT METAL FROM THE OPPOSITE END WHILE RESTRICTING FLOW THEREFROM EXCEPT AT A PLURALITY OF PLACES THEREON EACH HAVING SUBSTANTIALLY THE SAME AREA AND CONFIGURATION SO AS TO PRODUCE A PLURALITY OF EXTRUSIONS; APPLYING A PULL TO EACH EXTRUSION AS IT FORMS; AND PULLING THE BEGINNING END OF EACH EXTRUSION AWAY FROM THE INGOT AT THE SAME RATE WHILE EACH OF THE EXTRUSION ARE FORMING SO THAT EACH EXTRUSION HAS THE SAME LENGTH AS IT FORMS, SAID PULL BEING GREAT ENOUGH TO MAINTAIN EACH EXTRUSION SUBSTANTIALLY STRAIGHT.
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |