US3552938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security steel members with carbide inserts
Assignee: C M Windows and Stained Glass Ltd
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Filing: 1969-01-21
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Granted: 1971-01-05
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Expires: 1989-01-21
Abstract
Abstract THE INVENTION RELATES TO A NOVEL STRUCTURE FOR SECURITY STEEL MEMBERS OF VASTLY IMPROVED TOOL CUTTING RESISTANCE, THE STRUCTURE CONSISTING OF A STEEL BAR HAVING A PLURALITY OF TUNGSTEN OR OTHER HIGH HARDNESS CARBIDES FILLED LONGITUDINALLY EXTENDING GROOVES, THE WHOLE BEING CLAD IN A STEEL SLEEVE AND BONDED.
Inventors
- 👤 Cedo Draca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/01; B; B21; B21D; B21D47/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/24; Y10T428/24479; Y10T428/2457
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 |