US2580700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace discharge apparatus
Assignee: Alcan Research and Development Ltd
•
Filing: 1950-09-21
•
Granted: 1952-01-01
•
Expires: 1970-09-21
Abstract
No abstract record available.
Inventors
- 👤 Norman W F Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/02; C10B25/08; C10B25/10; B; B01; B01J; B01J4/00; B01J4/001; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1074509A
Cited
US1143411A
Cited
US1773750A
Cited
US2066082A
Cited
US2254900A
Cited
US2531068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |