US3269957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized antimony-tin oxide catalysts
Assignee: Distillers Co Yeast Ltd
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Filing: 1963-05-15
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Granted: 1966-08-30
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Expires: 1983-05-15
Abstract
No abstract record available.
Inventors
- 👤 Bethell James Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/12; H03J3/14; B; B01; B01J; B01J21/00; B01J23/00; B01J23/16; B01J23/18; B01J23/70; B01J23/76; B01J23/84; B01J23/843; B01J23/8435; B01J23/8437; B01J27/00; B01J27/14; B01J27/16; B01J27/18; C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0212; C01C3/0216; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; C07C5/00; C07C5/42; C07C5/48; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/224; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A CATALYTIC COMPOSITION SUITABLE FOR CATALYZING THE VAPOR PHASE OXIDATION OF HYDROCARBONS CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY TETROXIDE ADMIXED WITH STANNIC OXIDE AND A COMPOSITION CONSTITUED BY ANTIMONY, TIN AND OXYGEN, SAID MATERIAL BEING STABILIZED BY THE ADDITION OF AN OXIDE OF BISMUTH, THE AMOUNT OF THE OXIDE BEING PRESENT IN AN EFFECTIVE AMOUNT UP TO ABOUT 2% ON A MOLAR BASIS SUBSTANTIALLY TO REDUCE LOSS OF CATALYST ACTIVITY AND THEREBY INCREASE THE LIFE OF THE CATALYST.
Claim 2
Dependent Claim
84 words
A CATALYTIC COMPOSITION SUITABLE FOR CATALYZING THE VAPOR PHASE OXIDATION OF HYDROCARBONS CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY TETROXIDE ADMIXED WITH STANNIC OXIDE AND A COMPOSITION CONSTITUED BY ANTIMONY, TIN AND OXYGEN, SAID MATERIAL BEING STABILIZED BY THE ADDITION OF AN OXIDE OF BISMUTH, THE AMOUNT OF THE OXIDE BEING PRESENT IN AN EFFECTIVE AMOUNT UP TO ABOUT 2% ON A MOLAR BASIS SUBSTANTIALLY TO REDUCE LOSS OF CATALYST ACTIVITY AND THEREBY INCREASE THE LIFE OF THE CATALYST.
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |