Patent US3570086A successfully refreshed from Google Patents.
US3570086A
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Methods and machines for manufacture of expanded metal
Assignee: Metalex Corp
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Filing: 1969-04-21
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Granted: 1971-03-16
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Expires: 1989-04-21
Abstract
Abstract METHODS AND MACHINES ARE DISCLOSED FOR MANUFACTURING AN EXPANDED METAL PRODUCTS HAVING A ROUGHENED OR SERRATED SURFACE PORTION ADAPTING THE PRODUCT FOR USE AS A NON-SKID SAFETY WALKWAY OR THE LIKE. A MULTI-TOOTHED PUNCHING DIE IS RECIPOCATED IN A VERTICAL PLANE WITH ITS VERTICAL INTERIOR FACE CLOSELY ADJACENT THE VERTICALLY ORIENTED DIE FACE OF AN EXPANDING LEDGE. SHEET METAL IS ADVANCED ALONG A HORIZONTAL BED TOWARD THE LEDGE IN TIMED RELATION TO RECIPROCATION OF THE PUNCHING DIE WHICH DIE IS ALSO SHIFTED LATERALLY BETWEEN SUCCESSIVE DOWNWARD STROKES TO ESTABLISH THE OFFSET APERTURE PATTERN OF EXPANDED METAL.
Inventors
- 👤 Mark M Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:24
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/04; B21D31/043; Y; Y10; Y10T; Y10T29/00; Y10T29/18; Y10T29/185; Y10T29/49; Y10T29/496; Y10T83/00; Y10T83/929; Y10T83/9411; Y10T83/9449
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |