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US2468514A
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Apparatus for the recovery of crude benzole from benzolized wash-oil
Assignee: Woodall Duckham 1920 Ltd
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Filing: 1945-07-25
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Granted: 1949-04-26
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Expires: 1965-07-25
Abstract
No abstract record available.
Inventors
- 👤 Rider Douglas
- 👤 Chadder William James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:14
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/04; C10C1/08; C10C1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303321A
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US968833A
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US1282324A
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US1561899A
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US1916349A
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US1946020A
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US2146721A
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GB573659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |