US2424206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ammonium sulphate
Assignee: FUEL REFINING Corp
•
Filing: 1943-06-25
•
Granted: 1947-07-15
•
Expires: 1963-06-25
Abstract
No abstract record available.
Inventors
- 👤 Otto Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/24; C01C1/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB507351A
Cited
US2318463A
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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) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |