Patent US3784560A successfully refreshed from Google Patents.
US3784560A
Expired / Lapsed
US
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Process for the production of methacrylonitrile
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-05-20
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Granted: 1974-01-08
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Expires: 1991-05-20
Abstract
Abstract A PROCESS FOR THE PRODUCTION FO METHACRYLONITRILE IN HIGH YEILDS BY VAPOR-PHASE CATALYTIC AMMOXIDATION OF ISOBUTYLENE UTILIZING A CATALYST COMPRISING AS THE PRINCIPLE CATALYTIC COMPONENTS AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF FE, MN, CO, NI, CD AND PB OXIDES TOGETHER WITH AN OXIDE OF TUNGSTEN, AND, OPTIONALLY, AT LEAST ONE OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OG P, B, S, SE AND TE.
Inventors
- 👤 M Sobukawa
- 👤 I Nagase
- 👤 T Yoshino
- 👤 S Saito
- 👤 Y Sasaki
- 👤 M Nikura
- 👤 J Ishikura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:57
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/30; B01J23/32; B01J23/34; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/888; B01J27/00; B01J27/02; B01J27/057; B01J27/0573; B01J27/0576; B01J27/14; B01J27/186; B01J27/188; B01J2523/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |