Patent US2716665A successfully refreshed from Google Patents.
US2716665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of unsaturated aldehydes
Assignee: —
•
Filing: —
•
Granted: 1955-08-30
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Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:03
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/21; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; C07C45/29; C07C47/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
PROCESS FOR THE MANUFACTURE OF UNSATURATED ALDEHYDES BY THE CATALYTICAL OXIDATION OF OLEFINES OF THE GENERAL FORMULA R-C(CH3)=CHR1 WHEREIN R AND R1 REPRESENT SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, A SATURATED STRAIGHT CHAIN ALKYL GROUP AND A SATURATED BRANCHED CHAIN ALKYL GROUP WHICH COMPRISES REACTING THE OLEFINE IN THE VAPOUR PHASE AT A TEMPERATURE OF ABOUT 200-400* C. WITH MOLECULAR OXYGEN IN THE PRESENCE IN THE REACTION ZONE OF ELEMENTARY SELENIUM AND A SOLID CONTACT MATERIAL WHICH HAS BEEN PRODUCED BY PRECIPITATING CUPRIC SILICATE BY THE ADDITION OF AN AQUEOUS ALKALI METAL METASILICATE SOLUTION TO AN AQUEOUS CUPRIC SALT SOLUTION IN EQUIMOLECULAR PROPORTIONS AND MIXING THE RESULTING PRECIPITATE WITH AN AQUEOUS SUSPENSION OF SILICIC ACID IN A RATIO OF 2:12 MOLES OF SILICA TO ONE MOLE OF COPPER.
Claim 2
Dependent Claim
130 words
PROCESS FOR THE MANUFACTURE OF UNSATURATED ALDEHYDES BY THE CATALYTICAL OXIDATION OF OLEFINES OF THE GENERAL FORMULA R-C(CH3)=CHR1 WHEREIN R AND R1 REPRESENT SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, A SATURATED STRAIGHT CHAIN ALKYL GROUP AND A SATURATED BRANCHED CHAIN ALKYL GROUP WHICH COMPRISES REACTING THE OLEFINE IN THE VAPOUR PHASE AT A TEMPERATURE OF ABOUT 200-400* C. WITH MOLECULAR OXYGEN IN THE PRESENCE IN THE REACTION ZONE OF ELEMENTARY SELENIUM AND A SOLID CONTACT MATERIAL WHICH HAS BEEN PRODUCED BY PRECIPITATING CUPRIC SILICATE BY THE ADDITION OF AN AQUEOUS ALKALI METAL METASILICATE SOLUTION TO AN AQUEOUS CUPRIC SALT SOLUTION IN EQUIMOLECULAR PROPORTIONS AND MIXING THE RESULTING PRECIPITATE WITH AN AQUEOUS SUSPENSION OF SILICIC ACID IN A RATIO OF 2:12 MOLES OF SILICA TO ONE MOLE OF COPPER.
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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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |