US2599340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of increasing the permeability of oriented silicon steels
Assignee: Armco Inc
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Filing: 1948-10-21
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Granted: 1952-06-03
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Expires: 1968-10-21
Abstract
No abstract record available.
Inventors
- 👤 Martin F Littmann
- 👤 Joseph E Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:13
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1222; C21D8/1205; C21D8/1244; C21D8/1266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS OF PRODUCING HIGHLY ORIENTED SILICON STEEL FOR MAGNETIC PURPOSES, SAID STEEL CONTAINING SUBSTANTIALLY 2.3 TO 4% SILICON, INCLUDING AS STEPS AN INITIAL HOT ROLLING OF THE STEEL FROM SLABS FOLLOWED BY A COLD ROLLING TREATMENT AND A FINAL HIGH TEMPERATURE ANNEAL, WHICH PROCESS IS CHARACTERIZED BY THE STEP OFHEATING THE SAID SLAB PRIOR TO HOT ROLLING TO A TEMPERATURE OF SUBTANTIALLY 2500* F.
Claim 2
Dependent Claim
65 words
A PROCESS OF PRODUCING HIGHLY ORIENTED SILICON STEEL FOR MAGNETIC PURPOSES, SAID STEEL CONTAINING SUBSTANTIALLY 2.3 TO 4% SILICON, INCLUDING AS STEPS AN INITIAL HOT ROLLING OF THE STEEL FROM SLABS FOLLOWED BY A COLD ROLLING TREATMENT AND A FINAL HIGH TEMPERATURE ANNEAL, WHICH PROCESS IS CHARACTERIZED BY THE STEP OFHEATING THE SAID SLAB PRIOR TO HOT ROLLING TO A TEMPERATURE OF SUBTANTIALLY 2500* F.
References Cited (Backward Citations)
US2084337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |