Patent US3552166A successfully refreshed from Google Patents.
US3552166A
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Forming of annular workpieces
Assignee: NAT RES DEV
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Filing: 1968-01-29
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Granted: 1971-01-05
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Expires: 1988-01-29
Abstract
Abstract A METHOD OF FORMING A WORKPIECE COMPRISING MOVING A FORMING TOOL RELATIVE TO AT LEAST A PART OF THE WORKPIECE TO EFFECT FORMING BY PLASTIC FLOW AND APPLYING A TENSILE STRESS TO AT LEAST A PART OF THE WORKPIECE DURING THE FORMING IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF SAID RELATIVE MOVEMENT SO AS TO ASSIST AT LEAST PART OF THE FORMING PROCESS.
Inventors
- 👤 Alan Lawrence Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:56
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/202; B21H; B21H5/00; B21H5/02; B21K; B21K1/00; B21K1/28; B21K1/30
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |