US2994725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic chemical reactions
Assignee: Shell USA Inc
•
Filing: 1958-06-30
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Granted: 1961-08-01
•
Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Shaw
- 👤 Holzman George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; C07C2/54; C07C2/72; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/76; C07C2523/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR PRODUCING A DIMERIC CONDENSATION PRODUCT IN WHICH AN ORGANIC MOLECULE CONTAINING AN ACTIVE HYDROGEN ATOM OF THE GROUP CONSISTING OF MONO-OLEFINS AND ALKYLATED AROMATIC HYDROCARBONS COMBINES WITH AN ALKENE, WHICH COMPRISES CONTACTING A REACTANT MIXTURE CONTAINING BOTH TYPES OF MOLECULES AT A TEMPERATURE FROM ABOUT 100*C. TO 350*C. AND A PRESSURE OF FROM 5 TO 100 ATMOSPHERES WITH A CATALYTIC AMOUNT OF AN ALKALI METAL PROMOTED BY THE ADDITION OF PARTICLES OF FINELY-DIVIDED IRON.
Claim 2
Dependent Claim
77 words
A PROCESS FOR PRODUCING A DIMERIC CONDENSATION PRODUCT IN WHICH AN ORGANIC MOLECULE CONTAINING AN ACTIVE HYDROGEN ATOM OF THE GROUP CONSISTING OF MONO-OLEFINS AND ALKYLATED AROMATIC HYDROCARBONS COMBINES WITH AN ALKENE, WHICH COMPRISES CONTACTING A REACTANT MIXTURE CONTAINING BOTH TYPES OF MOLECULES AT A TEMPERATURE FROM ABOUT 100*C. TO 350*C. AND A PRESSURE OF FROM 5 TO 100 ATMOSPHERES WITH A CATALYTIC AMOUNT OF AN ALKALI METAL PROMOTED BY THE ADDITION OF PARTICLES OF FINELY-DIVIDED IRON.
References Cited (Backward Citations)
DE294817C
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US2466694A
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US2577289A
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US2688044A
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |