US2603578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treating silicon steel
Assignee: Blaw Knox Co
•
Filing: 1950-03-11
•
Granted: 1952-07-15
•
Expires: 1970-03-11
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel B Ornitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:28
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
IN THE HEAT TREATMENT OF SILICON STEEL IN WHICH SILICON STEEL IS HEATED TO A TEMPERATURE ABOVE 1600* F., SUPPORTING THE SILICON STEEL BY CARBON DURING THE HEAT TREATMENT TO INHIBIT FORMATION OF ACCRETIONS ON THE SUPPORTING MEANS.
Claim 2
Dependent Claim
38 words
IN THE HEAT TREATMENT OF SILICON STEEL IN WHICH SILICON STEEL IS HEATED TO A TEMPERATURE ABOVE 1600* F., SUPPORTING THE SILICON STEEL BY CARBON DURING THE HEAT TREATMENT TO INHIBIT FORMATION OF ACCRETIONS ON THE SUPPORTING MEANS.
References Cited (Backward Citations)
US669765A
Cited
US2057518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |