US2716080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing the strength of steel
Assignee: Individual
•
Filing: 1951-10-09
•
Granted: 1955-08-23
•
Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 Schwarz Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/06; C21D8/08; C21D8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS OF INCREASING THE STRENGHT OF STEEL, COMPRISING THE STEPS OF ANNEALING SAID STEEL, COLD-DRAWING SAID ANNEALED STEEL, THEREBY CAUSING HARDENING OF THE SURFACE AREA OF THE SAME; COLD-HAMMERING THE THUS COLDDRAWN STEEL IN SUBSEQUENT ANNULAR SECTIONS DISTRIBUTED OVER THE SURFACE OF THE SAME IN AT LEAST ONE TRANSIT THEREOF SO AS TO CAUSE DEEP HARDENING OF SAID STEEL, THEREBY CAUSING HARDENING OF THE SAME THROUGHOUT THE THICKNESS THEREOF; AND ALTERNATELY REPEATING SAID COLD-DRAWING AND COLD-HUMMERING UNTIL THE STRENGTH OF THE STEEL IN INCREASED TO A PREDETERMINED DEGREE.
Claim 2
Dependent Claim
89 words
A PROCESS OF INCREASING THE STRENGHT OF STEEL, COMPRISING THE STEPS OF ANNEALING SAID STEEL, COLD-DRAWING SAID ANNEALED STEEL, THEREBY CAUSING HARDENING OF THE SURFACE AREA OF THE SAME; COLD-HAMMERING THE THUS COLDDRAWN STEEL IN SUBSEQUENT ANNULAR SECTIONS DISTRIBUTED OVER THE SURFACE OF THE SAME IN AT LEAST ONE TRANSIT THEREOF SO AS TO CAUSE DEEP HARDENING OF SAID STEEL, THEREBY CAUSING HARDENING OF THE SAME THROUGHOUT THE THICKNESS THEREOF; AND ALTERNATELY REPEATING SAID COLD-DRAWING AND COLD-HUMMERING UNTIL THE STRENGTH OF THE STEEL IN INCREASED TO A PREDETERMINED DEGREE.
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Cited
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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) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |