Patent US5742283A successfully refreshed from Google Patents.
Patent US1350419A successfully refreshed from Google Patents.
US1350419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for reducing metallig oxids
Assignee: Individual
•
Filing: 1918-01-22
•
Granted: 1920-08-24
•
Expires: 1938-01-22
Abstract
No abstract record available.
Inventors
- 👤 Walter L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/08; C21B13/085; C21B13/0006; C21B13/0026; C21B13/006; C21B13/008; C21B13/0086; C21B13/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1923-08-24 | 1924-02-23 | 1924-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-08-24 | 1928-02-23 | 1928-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-08-24 | 1932-02-23 | 1932-08-24 | $7700.00 | Window Closed / Lapsed |