US2531327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of vinyl xylenes
Assignee: California Research LLC
•
Filing: 1948-07-01
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Granted: 1950-11-21
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Expires: 1968-07-01
Abstract
No abstract record available.
Inventors
- 👤 William E Elwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PRODUCING METHYL AND DIMETHYL VINYL BENZENES POLYMERIZABLE TO VINYL BENZENE POLYMERS HAVING HEAT DISTORTION POINTS IN EXCESS OF 80*C. BY CATALYTIC DEHYDROGENATION OF ORTHOETHYLTOLUNE AND ETHYL XYLENES HAVING A METHYL GROUP IN ORTHO RELATIONSHIP TO THE ETHYL GROUP WHICH COMPRISES CATALYTICALLY DEHYDROGENATING ONE PART BY WEIGHT OF A MATERIAL FROM THE GROUP CONSISTING OF ORTHOETHYLTOLUENE, 2,3-DIMETHYL 1-ETHYLBENZENE, 2,4-DIMETHYL 1-ETHYLBENZENE, 2,5-DIMETHYL 1-ETHYLBENZENE AND 2,6-DI-
Claim 2
Independent Claim
66 words
THE METHOD OF PRODUCING METHYL AND DIMETHYL VINYL BENZENES POLYMERIZABLE TO VINYL BENZENE POLYMERS HAVING HEAT DISTORTION POINTS IN EXCESS OF 80*C. BY CATALYTIC DEHYDROGENATION OF ORTHOETHYLTOLUNE AND ETHYL XYLENES HAVING A METHYL GROUP IN ORTHO RELATIONSHIP TO THE ETHYL GROUP WHICH COMPRISES CATALYTICALLY DEHYDROGENATING ONE PART BY WEIGHT OF A MATERIAL FROM THE GROUP CONSISTING OF ORTHOETHYLTOLUENE, 2,3-DIMETHYL 1-ETHYLBENZENE, 2,4-DIMETHYL 1-ETHYLBENZENE, 2,5-DIMETHYL 1-ETHYLBENZENE AND 2,6-DI-
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |