US3559445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipercing tool for sheet material
Assignee: Individual
•
Filing: 1968-05-06
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Granted: 1971-02-02
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Expires: 1988-05-06
Abstract
Abstract A TOOL FOR PIERCING HOLES IN SHEET MATERIAL, SUCH AS SHEET METAL, PLASTIC, ETC., HAVING A TAPERED PORTION TERMINATING IN A POINT. THE TAPERED PORTION HAVING AT LEAST ONE BLUNT TAPERED EDGE WHICH EXTENDS DOWN TO THE POINTED END OF THE TOOL WHICH PROJECTS RADIALLY FROM THE ROTATING AXIS OF THE TOOL A GREATER EXTENT THAN THE REMAINING SURFACE PORTION OF THE TAPERED PORTION OF THE TOOL.
Inventors
- 👤 Everett D Hougen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:50
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/24; B21; B21D; B21D28/00; B21D28/24; B21D28/34; B21D37/00; B21J; B21J5/00; B21J5/06; B21J5/063; B21J5/066; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; B26F1/02; B23B2251/00; B23B2251/24; B23B2251/241; B23B2265/00; B23B2265/16; B23B2265/32; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9314
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |