US1815899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the treatment of iron ore
Assignee: Brassert & Co
•
Filing: 1929-01-14
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Granted: 1931-07-28
•
Expires: 1949-01-14
Abstract
No abstract record available.
Inventors
- 👤 Herman A Brassert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/06; C21B5/00; C21B5/06; C21B2100/00; C21B2100/20; C21B2100/22; C21B2100/60; C21B2100/66; Y; Y02; Y02P; Y02P10/00; Y02P10/25
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) | 1934-07-27 | 1935-01-26 | 1935-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-27 | 1939-01-26 | 1939-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-27 | 1943-01-26 | 1943-07-28 | $7700.00 | Window Closed / Lapsed |