Patent US3138981A successfully refreshed from Google Patents.
US3138981A
Expired / Lapsed
US
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Metal scribing
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1962-04-12
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Granted: 1964-06-30
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Expires: 1982-04-12
Abstract
No abstract record available.
Inventors
- 👤 John H Werthman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:08
CPC Classifications
B; B21; B21D; B21D19/00; B21D19/005; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0385; Y10T83/04; Y10T83/0581
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN THE METHOD OF ROLLING STEEL STRIP IN WHICH THERE ARE AT LEAST TWO ROLLING PASSES AND WHEREIN DURING THE FIRST PASS EDGE CHECKS OR CRACKS MAY BE INITIATED AND DURING THE SECOND PASS THE EDGE CHECKS OR CRACKS TEND TO PROGRESS INWARDLY FROM THE EDGES THE IMPROVEMENT WHICH COMPRISES, SCRIBING GROOVES ON SAID STRIP NEAR ITS EDGES AFTER THE FIRST PASS AND BEFORE THE SECOND PASS WHEREBY PROGRESSION OF THE EDGE CHECKS OR CRACKS WILL BE ARRESTED WHEN THEY REACH A GROOVE.
Claim 2
Dependent Claim
83 words
IN THE METHOD OF ROLLING STEEL STRIP IN WHICH THERE ARE AT LEAST TWO ROLLING PASSES AND WHEREIN DURING THE FIRST PASS EDGE CHECKS OR CRACKS MAY BE INITIATED AND DURING THE SECOND PASS THE EDGE CHECKS OR CRACKS TEND TO PROGRESS INWARDLY FROM THE EDGES THE IMPROVEMENT WHICH COMPRISES, SCRIBING GROOVES ON SAID STRIP NEAR ITS EDGES AFTER THE FIRST PASS AND BEFORE THE SECOND PASS WHEREBY PROGRESSION OF THE EDGE CHECKS OR CRACKS WILL BE ARRESTED WHEN THEY REACH A GROOVE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |