US3379581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurizing coating for ferrous material and method of using it
Assignee: Armco Inc
•
Filing: 1964-12-21
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Granted: 1968-04-23
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Dale M Kohler
- 👤 Victor W Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/02; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C21D1/72; C21D3/00; C21D3/02; C23; C23C; C23C24/00
Claims Analysis
Total Claims: 0
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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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |