US850039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore-roasting apparatus.
Assignee: Individual
•
Filing: 1903-07-06
•
Granted: 1907-04-09
•
Expires: 1923-07-06
Abstract
No abstract record available.
Inventors
- 👤 Robert Mcknight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:46
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/21
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) | 1910-04-08 | 1910-10-08 | 1911-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-04-08 | 1914-10-08 | 1915-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-04-08 | 1918-10-08 | 1919-04-09 | $7700.00 | Window Closed / Lapsed |