US3833649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing unsaturated carboxylic acids
Assignee: Nippon Shokubai Co Ltd
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Filing: 1971-10-19
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Granted: 1974-09-03
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Expires: 1991-10-19
Abstract
Abstract A PROCESS FOR PRODUCING UNSATURATED CARBOXYLIC ACIDS, WHICH COMPRISES OXIDIZING UNSATURATED ALDEHYDES IN THE VAPOR PHASE IN THE PRESENCE OF A CATALYST COMPRISING A CATALYTIC OXIDE SUPPORTED ON AN INERT CARRIER, SUCH CATALYTIC OXIDE CONTAINING METAL ELEMENTS IN THE ATOMIC RATIO M0:V:CU:CR:W OF 12:2-14:1-6:0-4:0-12 WITH THE PROVISO THAT CR+W IS NOT O.
Inventors
- 👤 Masahiro Wada
- 👤 Takashi Ohara
- 👤 Isao Yanagisawa
- 👤 Michkazu Ninomiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |