US2985594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal addition compounds of alpha-methyl styrene and method of making
Assignee: Dow Chemical Co
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Filing: 1958-08-20
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Granted: 1961-05-23
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Robert L Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
C; C07; C07F; C07F1/00; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF EFFECTING THE ADDITION OF AN ALKALI METAL TO ALPHA-METHYL STYRENE TO FORM THE CORRESPONDING DIALKALI METAL ADDITION COMPOUNDS OF POLYMERIC ALPHAMETHYL STYRENE CONSISTING OF THE TRIMERS TO HEXAMERS, WHICH METHOD COMPRISES REACTING AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ALLOYS THEREOF AND MIXTURES THEREOF, WITH ALPHA-METHYL STYRENE BY BRINGING THE ALPHA-METHYL STYRENE INTO CONTACT WITH THE ALKALI METAL IN A REACTION MEDIUM COMPRISING AN ETHER SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURANE, 1,4-DIOXANE AND ALIPHATIC ETHERS IN WHICH THERE IS A CH3-O-GROUP, IN PROPORTIONS CORRESPONDING TO FROM 0.5 TO 4 GRAM ATOMIC WEIGHTS OF SAID ALKALI METAL PER GRAM MOLECULAR PROPORTION OF THE ALPHAMETHYL STYRENE AT TEMPERATURES BETWEEN -15* AND 50* C. AND ABOVE THE CEILING TEMPERATURE FOR THE ALPHAMETHYL STYRENE AS DETERMINED FROM THE EQUATION:
Claim 2
Independent Claim
133 words
A METHOD OF EFFECTING THE ADDITION OF AN ALKALI METAL TO ALPHA-METHYL STYRENE TO FORM THE CORRESPONDING DIALKALI METAL ADDITION COMPOUNDS OF POLYMERIC ALPHAMETHYL STYRENE CONSISTING OF THE TRIMERS TO HEXAMERS, WHICH METHOD COMPRISES REACTING AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, ALLOYS THEREOF AND MIXTURES THEREOF, WITH ALPHA-METHYL STYRENE BY BRINGING THE ALPHA-METHYL STYRENE INTO CONTACT WITH THE ALKALI METAL IN A REACTION MEDIUM COMPRISING AN ETHER SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURANE, 1,4-DIOXANE AND ALIPHATIC ETHERS IN WHICH THERE IS A CH3-O-GROUP, IN PROPORTIONS CORRESPONDING TO FROM 0.5 TO 4 GRAM ATOMIC WEIGHTS OF SAID ALKALI METAL PER GRAM MOLECULAR PROPORTION OF THE ALPHAMETHYL STYRENE AT TEMPERATURES BETWEEN -15* AND 50* C. AND ABOVE THE CEILING TEMPERATURE FOR THE ALPHAMETHYL STYRENE AS DETERMINED FROM THE EQUATION:
References Cited (Backward Citations)
US2816913A
Cited
US2816914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |