US2149688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of slag
Assignee: Individual
•
Filing: 1936-09-10
•
Granted: 1939-03-07
•
Expires: 1956-09-10
Abstract
No abstract record available.
Inventors
- 👤 Charles W Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:29
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/05; C21B2400/066; C21B2400/072; Y; Y02; Y02W; Y02W30/00; Y02W30/50
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) | 1942-03-06 | 1942-09-05 | 1943-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-06 | 1946-09-05 | 1947-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-06 | 1950-09-05 | 1951-03-07 | $7700.00 | Window Closed / Lapsed |