Patent US3547783A successfully refreshed from Google Patents.
US3547783A
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Method for refining acetone by rectification with alkali-contact of vapors and water addition and phase separation of a chlorinated-by-product-containing side stream
Assignee: Mitsubishi Chemical Corp
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Filing: 1969-07-03
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Granted: 1970-12-15
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Expires: 1989-07-03
Abstract
No abstract record available.
Inventors
- 👤 Shinichi Yamaguchi
- 👤 Toshio Teranishi
- 👤 Satoshi Ogura
- 👤 Shiro Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:38
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/40; C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; Y; Y10; Y10S; Y10S203/00; Y10S203/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2238016A
Cited
US2669541A
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US2797191A
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US3031384A
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US3265592A
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US3330741A
Cited
US3365375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |