US2470764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating waste sulfite liquor
Assignee: Individual
•
Filing: 1943-09-23
•
Granted: 1949-05-24
•
Expires: 1963-09-23
Abstract
No abstract record available.
Inventors
- 👤 Dunbar Thomas Leonidas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:53
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1716623A
Cited
US1057416A
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US1130817A
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US1155256A
Cited
US1236948A
Cited
US1445603A
Cited
US1881557A
Cited
US1737590A
Cited
US1795758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |