Patent US3203211A successfully refreshed from Google Patents.
US3203211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing fabrication
Assignee: Individual
•
Filing: 1961-05-22
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Granted: 1965-08-31
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Expires: 1981-05-22
Abstract
No abstract record available.
Inventors
- 👤 George E Mallinckrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:48
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/14; B21D; B21D26/00; B21D26/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD FOR FABRICATING METALLIC TUBING FROM AN ELONGATE METAL ROD COMPRISING MOMENTARILY APPLYING LARGE COMPRESSIVE FORCES TO THE OUTER SURFACES OF SAID ROD BY MEANS OF A TRANSIENT ELECTROMAGNETIC FIELD TO CAUSE SHOCK WAVES TO CONVERGE SYMMETRICALLY AND RADIALLY INWARDLY ON THE LONGITUDINAL CENTRAL AXIS OF SAID ROD THERE-
Claim 2
Independent Claim
50 words
A METHOD FOR FABRICATING METALLIC TUBING FROM AN ELONGATE METAL ROD COMPRISING MOMENTARILY APPLYING LARGE COMPRESSIVE FORCES TO THE OUTER SURFACES OF SAID ROD BY MEANS OF A TRANSIENT ELECTROMAGNETIC FIELD TO CAUSE SHOCK WAVES TO CONVERGE SYMMETRICALLY AND RADIALLY INWARDLY ON THE LONGITUDINAL CENTRAL AXIS OF SAID ROD THERE-
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |