US2463204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sludge acids
Assignee: Individual
•
Filing: 1942-07-23
•
Granted: 1949-03-01
•
Expires: 1962-07-23
Abstract
No abstract record available.
Inventors
- 👤 Gustave T Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1257895A
Cited
US1263950A
Cited
US1361940A
Cited
US1415443A
Cited
US1384978A
Cited
US1423766A
Cited
GB361509A
Cited
US1844513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |