Patent US3616518A successfully refreshed from Google Patents.
US3616518A
Expired / Lapsed
US
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Method of simultaneously forming an apertured panel and a related closure panel
Assignee: Pressed Steel Fisher Ltd
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Filing: 1969-03-18
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Granted: 1971-11-02
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Expires: 1989-03-18
Abstract
Abstract A METHOD OF FORMING AN APERTURED PANEL AND A CLOSURE PANEL FOR THE APERTURE OR FOR ANOTHER APERTURE IN A RELATED APERTURED PANEL, WHICH INCLUDES FORMING THE CLOSURE PANEL AND THE APERTURED PANEL SIMULTANEOUSLY FROM A SINGLE SHEET OF MATERIAL WITH THE GENERAL PLANES OF THE PANELS MUTUALLY DISPLACED BY A (PREFERABLY TAPERED) WALL PORTION, THE WALL PORTION IS THEN SEVERED TO SEPARATE THE PANELS AND THE PORTIONS OF THE WALL REMAINING ON ONE OR BOTH PANELS PROVIDES MATERIAL FOR CLINCHING OVER OR FOR FORMING A FLANGED EDGE.
Inventors
- 👤 Bernard Brian Hundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:54
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; B21D53/00; B21D53/80; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49792; Y10T29/49796
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |