Patent US3828099A successfully refreshed from Google Patents.
US3828099A
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US
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Process for separating methacrolein
Assignee: Nippon Shokubai Co Ltd
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Filing: 1971-03-02
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Granted: 1974-08-06
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Expires: 1991-03-02
Abstract
Abstract A METHOD FOR SEPARATING METHACROLEIN FROM A GASEOUS MIXTURE THEREOF BY ABSORBING THE METHACROLEIN WITH AN ORGANIC SOLVENT AND THEN EXTRACTING THE ORGANIC SOLVENT FROM THE RESULTING SOLUTION WITH WATER. D R A W I N G
Inventors
- 👤 R Sato
- 👤 Y Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:05
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/783; C07C45/80; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |