US2886304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel production
Assignee: Individual
•
Filing: 1956-07-23
•
Granted: 1959-05-12
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 James M Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:27
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; F; F27; F27B; F27B3/00; F27B3/10; F27B3/18; F27D; F27D3/00; F27D2003/0034; F27D2003/008; F27D2003/0085; F27D2003/0089; F27D2003/009; F27D3/12; F27D2003/125; F27D2003/127; F27D3/14; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |