US3347718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the magnetic properties of ferrous sheets
Assignee: Armco Inc
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Filing: 1964-01-20
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Granted: 1967-10-17
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Victor W Carpenter
- 👤 Chester E Ward
- 👤 Martin F Littmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:25
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1233; C22; C22C; C22C38/00; C22C38/02; C22C38/06; C22C38/08; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/16; C21D8/1277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1619399A
Cited
US3090711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |