Patent US2816936A successfully refreshed from Google Patents.
US2816936A
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Process for formation of dialkali metal dimers of diolefins
Assignee: Millennium Petrochemicals Inc
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Filing: 1955-12-30
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Granted: 1957-12-17
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Virgil L Hansley
- 👤 Schott Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:27
CPC Classifications
C; C07; C07F; C07F1/00; B; B01; B01J; B01J16/00; C07C; C07C51/00; C07C51/15; C07C51/347; C07C51/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR SELECTIVE FORMATION OF DIALKALI METAL DIMERS OF A CONJUGATED ALIPHATIC DIOLEFIN WHICH COMPRISES REACTING A CONJUGATED ALIPHATIC DIOLEFIN WITH FINELY DIVIDED PARTICLES OF AN ALKALI METAL DISPERSED IN AN ETHER REACTION MEDIUM 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, SAID FINELY DIVIDED ALKALI METAL BEING COMPRISED OF PARTICLES OF WHICH MORE THAN ABOUT 30% ARE LESS THAN ABOUT FIVE MICRONS IN SIZE AND THE AVERAGE PARTICLE SIZE OF THE ALKALI METAL PARTICLES IS SUBSTANTIALLY LESS THAN EIGHT MICRONS.
Claim 2
Dependent Claim
117 words
A PROCESS FOR SELECTIVE FORMATION OF DIALKALI METAL DIMERS OF A CONJUGATED ALIPHATIC DIOLEFIN WHICH COMPRISES REACTING A CONJUGATED ALIPHATIC DIOLEFIN WITH FINELY DIVIDED PARTICLES OF AN ALKALI METAL DISPERSED IN AN ETHER REACTION MEDIUM 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, SAID FINELY DIVIDED ALKALI METAL BEING COMPRISED OF PARTICLES OF WHICH MORE THAN ABOUT 30% ARE LESS THAN ABOUT FIVE MICRONS IN SIZE AND THE AVERAGE PARTICLE SIZE OF THE ALKALI METAL PARTICLES IS SUBSTANTIALLY LESS THAN EIGHT MICRONS.
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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |