US3853792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic metal oxide
Assignee: Nippon Shokubai Co Ltd
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Filing: 1973-07-16
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Granted: 1974-12-10
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Expires: 1993-07-16
Abstract
Abstract A catalytic oxide particularly adapted for the preparation of acrylic acid through the catalytic oxidation of acrolein in the vapor phase with molecular oxygen, the catalytic oxide comprising one in which the atomic ratio of the constitutional metal elements is within the following range:
Inventors
- 👤 I Yanagisawa
- 👤 M Wada
- 👤 T Ohara
- 👤 M Ninomiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:07
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: 4
Claim 1
Independent Claim
23 words
A CATALYTIC OXIDE CONSISTING ESSENTIALLY OF A COMPLEX OXIDE IN WHICH THE ATOMIC RATIO OF THE METAL ELEMENTS IS WITHIN THE FOLLOWING RANGE;
Claim 2
Dependent Claim
23 words
A CATALYTIC OXIDE CONSISTING ESSENTIALLY OF A COMPLEX OXIDE IN WHICH THE ATOMIC RATIO OF THE METAL ELEMENTS IS WITHIN THE FOLLOWING RANGE;
Claim 3
Dependent Claim
16 words
The catalytic oxide of claim 1 wherein said catalytic oxide is supported on an inactive carrier.
Claim 4
Dependent Claim
54 words
The catalytic oxide of claim 1 wherein said catalytic oxide is supported on an inactive carrier having a specific surface area of less than 2 m2/g and a porosity of 10 - 65 percent and at least 90 percent of the pores of said carrier having a macropore diameter of 20 to 1,500 microns.
References Cited (Backward Citations)
GB1084143A
Cited
US3644509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |