US3775474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of acrylic acid
Assignee: Nippon Shokubai Co Ltd
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Filing: 1972-04-20
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Granted: 1973-11-27
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Expires: 1992-04-20
Abstract
Abstract A PROCESS FOR THE PENETRATION OF ACRYLIC ACID COMPRISING CATALYTICALLY OXIDIZING ACROLEIN IN THE VAPOR PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF A CATALYTIC OXIDE IN WHICH THE ATOMIC RATIO OF THE CONSTITUTIONAL METAL ELEMENTS IS WITHIN THE FOLLOWING RANGE: VAMOBWCCRDCUE WHERE 14<A$24, B=12, 4$C<20, 1 $D<10 AND 0$E<12
Inventors
- 👤 T Ohara
- 👤 M Ninomiya
- 👤 I Yanagisawa
- 👤 M Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8878; B01J23/16; B01J23/24; B01J23/30; B01J23/888; B01J23/8885; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |