Patent US2956086A successfully refreshed from Google Patents.
US2956086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrocarbons
Assignee: Millennium Petrochemicals Inc
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Filing: 1957-12-16
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Granted: 1960-10-11
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Charles E Frank
- 👤 John R Leebrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:13
CPC Classifications
C; C07; C07F; C07F1/00; C07C; C07C1/00; C07C1/32; C07C1/325; C07C1/328; C07C15/00; C07C15/12; C07C51/00; C07C51/15; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE PROCESS WHICH COMPRISES REATION STYRENE WITH A FINELY DISPERSED ALKALI METAL IN A REACTION MEDUIM COMPRISING SUBSTANTIALLY AN ETHER SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONOETHERS HAVING A METHOXY GROUP AND AN OXYGEN TO CARBON RATIO OF NOT LESS THAN 1:4 AND POLYETHERS DERIVED FROM AN ALIPHATIC POLYHYDRIC ALCOHOL HAVING ALL THE HYDROXYL HYDROGEN ATOMS REPLACED BY ALKYL GROUPS AND MIXTURES THEREOF, IN THE PRESENCE OF A RELATIVELY SMALL AMOUNT OF A POLYCYCLIC AROMATIC COMPOUND AT A TEMPERATURE OF BELOW ABOUT 0*C. TO PROVIDE A REACTION MIXTURE COMPRISING DIALKALI METAL DIMERS OF STRYENE, AND HYDROLYZING SAID DIALKALI METAL DIMERS TO OBTAIN A HYDROLYSIS PRODUCT SUBSTANTIALLY COMPRISING 1,4-DIPHENYLBUTANE.
Claim 2
Dependent Claim
109 words
THE PROCESS WHICH COMPRISES REATION STYRENE WITH A FINELY DISPERSED ALKALI METAL IN A REACTION MEDUIM COMPRISING SUBSTANTIALLY AN ETHER SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONOETHERS HAVING A METHOXY GROUP AND AN OXYGEN TO CARBON RATIO OF NOT LESS THAN 1:4 AND POLYETHERS DERIVED FROM AN ALIPHATIC POLYHYDRIC ALCOHOL HAVING ALL THE HYDROXYL HYDROGEN ATOMS REPLACED BY ALKYL GROUPS AND MIXTURES THEREOF, IN THE PRESENCE OF A RELATIVELY SMALL AMOUNT OF A POLYCYCLIC AROMATIC COMPOUND AT A TEMPERATURE OF BELOW ABOUT 0*C. TO PROVIDE A REACTION MIXTURE COMPRISING DIALKALI METAL DIMERS OF STRYENE, AND HYDROLYZING SAID DIALKALI METAL DIMERS TO OBTAIN A HYDROLYSIS PRODUCT SUBSTANTIALLY COMPRISING 1,4-DIPHENYLBUTANE.
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |