US2436157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical process and apparatus
Assignee: MINERALS AND METALS Corp
•
Filing: 1941-12-15
•
Granted: 1948-02-17
•
Expires: 1961-12-15
Abstract
No abstract record available.
Inventors
- 👤 Carl J Westling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:34
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |