US1242833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smelting process and apparatus.
Assignee: Individual
•
Filing: 1911-12-20
•
Granted: 1917-10-09
•
Expires: 1931-12-20
Abstract
No abstract record available.
Inventors
- 👤 Ezra A Mathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:38
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0039; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217
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) | 1920-10-08 | 1921-04-09 | 1921-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-10-08 | 1925-04-09 | 1925-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-10-08 | 1929-04-09 | 1929-10-09 | $7700.00 | Window Closed / Lapsed |