Patent US2990434A successfully refreshed from Google Patents.
US2990434A
Expired / Lapsed
US
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Polymerization of acetylenic compounds
Assignee: Imperial Chemical Industries Ltd
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Filing: 1956-10-29
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Granted: 1961-06-27
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Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Smith William Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/48; C08; C08F; C08F10/00; C07C2527/00; C07C2527/06; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE SYNTHESIS OF A HEXA-SUBSTITUTED BENZENE COMPOUND, SELECTED FROM THE GROUP CONSISTING OF ALKYL-, AND ARYL-HYDROCARBON-HEXA-SUBSTITUTED BENZENE, WHICH COMPRISES POLYMERIZING, IN THE LIQUID PHASE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 100*C., AN ACETYLENIC COMPOUND HAVING THE FORMULA R-C=C-R'', WHEREIN R AND R'' ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL, IN THE PRESENCE OF A CATALYST COMPOSED OF THE REACTION PRODUCT OF (1) AN ORGANO-COMPOUND OF A NON-TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS 1, 2, AND 3 OF THE PERIODIC TABLE AND WHEREIN THE ORGANO-RADICAL IS A LOWER MOLECULAR WEIGHT HYDROCARBON AND (2) TITANIUM TETRACHLORIDE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE SYNTHESIS OF A HEXA-SUBSTITUTED BENZENE COMPOUND, SELECTED FROM THE GROUP CONSISTING OF ALKYL-, AND ARYL-HYDROCARBON-HEXA-SUBSTITUTED BENZENE, WHICH COMPRISES POLYMERIZING, IN THE LIQUID PHASE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 100*C., AN ACETYLENIC COMPOUND HAVING THE FORMULA R-C=C-R'', WHEREIN R AND R'' ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL, IN THE PRESENCE OF A CATALYST COMPOSED OF THE REACTION PRODUCT OF (1) AN ORGANO-COMPOUND OF A NON-TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS 1, 2, AND 3 OF THE PERIODIC TABLE AND WHEREIN THE ORGANO-RADICAL IS A LOWER MOLECULAR WEIGHT HYDROCARBON AND (2) TITANIUM TETRACHLORIDE.
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |