US2218391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making stainless steel
Assignee: BARIUM STAINLESS STEEL Corp
•
Filing: 1938-03-30
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Granted: 1940-10-15
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Expires: 1958-03-30
Abstract
No abstract record available.
Inventors
- 👤 William D Bradford
- 👤 Roy F Lab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/005; F; F27; F27B; F27B3/00; F27B3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |