US2755544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treatment
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1952-07-10
•
Granted: 1956-07-24
•
Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:33
CPC Classifications
B; B21; B21J; B21J1/00; B21J1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF PREPARING WROUGHT ALUMINUM METAL STOCK AND THE LIKE PRIOR TO THE FINAL FORGING THEREOF INCLUDING THE STEPS OF PLACING A HEATED ALUMINUM METAL BLANK IN A CONFINED ZONE, THEREAFTER APPLYING EXTERNAL PRESSURE TO ONE END OF SAID BLANK SO AS TO CAUSE SUCCESSIVE LONGITUDINAL PORTIONS OF SAID BLANK TO PASS INTO AND THROUGH A SECOND CONFINED ZONE CONTIGUOUS TO SAID FIRST ZONE AND REDUCING THE CROSS-SECTION OF SAID SUCCESSIVE LONGITUDINAL PORTIONS OF THE BLANK DURING THE PASSAGE THEREOF THROUGH SAID SECOND ZONE, AND IMMEDIATELY THEREAFTER BY THE CONTINUED APPLICATION OF TH SAME EXTERNAL PRESSURE CAUSING THE SAID REDUCED IN CROSS-SECTIONAL PORTIONS OF SAID BLANK TO PASS FROM SAID SECOND ZONE INTO A THIRD CONFINED ZONE
Claim 2
Independent Claim
118 words
A METHOD OF PREPARING WROUGHT ALUMINUM METAL STOCK AND THE LIKE PRIOR TO THE FINAL FORGING THEREOF INCLUDING THE STEPS OF PLACING A HEATED ALUMINUM METAL BLANK IN A CONFINED ZONE, THEREAFTER APPLYING EXTERNAL PRESSURE TO ONE END OF SAID BLANK SO AS TO CAUSE SUCCESSIVE LONGITUDINAL PORTIONS OF SAID BLANK TO PASS INTO AND THROUGH A SECOND CONFINED ZONE CONTIGUOUS TO SAID FIRST ZONE AND REDUCING THE CROSS-SECTION OF SAID SUCCESSIVE LONGITUDINAL PORTIONS OF THE BLANK DURING THE PASSAGE THEREOF THROUGH SAID SECOND ZONE, AND IMMEDIATELY THEREAFTER BY THE CONTINUED APPLICATION OF TH SAME EXTERNAL PRESSURE CAUSING THE SAID REDUCED IN CROSS-SECTIONAL PORTIONS OF SAID BLANK TO PASS FROM SAID SECOND ZONE INTO A THIRD CONFINED ZONE
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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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |