US3135783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of unsaturated nitriles
Assignee: Knapsack AG
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Filing: 1960-12-20
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Granted: 1964-06-02
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Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Sennewald Kurt
- 👤 Vogt Wilhelm
- 👤 Kandler Joachim
- 👤 Sommerfeld Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/843; B01J23/8437; B01J23/002; B01J23/847; B01J23/8472; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; B01J27/186; B01J27/195; B01J27/198; C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B01J2523/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR THE MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE BY REACTING A GAS SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE RESPECTIVELY, WITH AMMONIA AND AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN AT A TEMPERATURE OF ABOUT 250 TO 600*C. UNDER A PRESSURE OF ABOUT 0.1 TO 10 ABSOLUTE ATMOSPHERES ON A CATALYST APPLIED TO A CARRIER MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, SILICON DIOXIDE, SILICON CARIDE, ALUMINUM OXIDE, PUMICE, AND MIXTURES THEREOF, AND WITH A TIME DWELL OF THE GAS MIXTURE ON THE CATALYST BETWEEN 0.05 TO 50 SECONDS, THE IMPROVEMENT OF USING AS CATALYST A MEMBER SELECTED FROM THE FOLLOWING GROUP CONSISTING OF:
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR THE MANUFACTURE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE BY REACTING A GAS SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE RESPECTIVELY, WITH AMMONIA AND AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN AT A TEMPERATURE OF ABOUT 250 TO 600*C. UNDER A PRESSURE OF ABOUT 0.1 TO 10 ABSOLUTE ATMOSPHERES ON A CATALYST APPLIED TO A CARRIER MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, SILICON DIOXIDE, SILICON CARIDE, ALUMINUM OXIDE, PUMICE, AND MIXTURES THEREOF, AND WITH A TIME DWELL OF THE GAS MIXTURE ON THE CATALYST BETWEEN 0.05 TO 50 SECONDS, THE IMPROVEMENT OF USING AS CATALYST A MEMBER SELECTED FROM THE FOLLOWING GROUP CONSISTING OF:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |