US3775508A
Expired / Lapsed
US
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Tin-phoshorus catalyzed oxidative dehydrogenation
Assignee: Phillips Petroleum Co
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Filing: 1971-04-16
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Granted: 1973-11-27
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Expires: 1991-04-16
Abstract
Abstract THE ACTIVITY OF TIN-PHOSPHORUS OXIDATIVE DEHYDROGENATION CATALYSTS IS SIGNIFICANTLY IMPROVED BY INCLUDING A HEATVOLATILE ACTIVITY-STIMULATING AMMONIUM SALT IN THE CATALYST COMPOSITION PRIOR TO THE CATALYST PARTICLE-FORMING STAGE.
Inventors
- 👤 E Pitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:40
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; B; B01; B01J; B01J23/00; B01J23/14; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1813; B01J37/00; B01J37/0009; B01J37/0018; C07C; C07C5/00; C07C5/42; C07C5/48; C07D307/00; C07D307/02; C07D307/34; C07D307/36; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
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) | 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 |