US2723299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of styrene and benzene from acetylene and vinylacetylene
Assignee: Mitsui Chemical Industry Co Ltd
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Filing: 1952-08-22
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Granted: 1955-11-08
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Expires: 1972-08-22
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Manzo
- 👤 Yamamoto Kazumi
- 👤 Oku Mitsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:31
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/48; C07C2527/00; C07C2527/06; C07C2527/122; C07C2527/138; C07C2531/00; C07C2531/16; C07C2531/22; C07C2531/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PREPARING STYRENE AND BENZENE WHICH COMPRISES HEATING A MIXTURE IN A MOLAR RATIO OF 1.5:1 TO 20:1 OF ACETYLENE AND MONOVINYLACETYLENE TO A TEMPERATURE OF 40* TO 150*C. UNDER A PRESSURE WITHIN THE RANGE OF 70 TO 700 LBS/SQ. IN. IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, ACETONITRILE AND TETRAHYDROFURAN, THE PRESENCE OF TRIPHENYLPHOSPHINE NICKEL-BICARBONYL AS CATALYST, AND RECOVERING STYRENE AND BENZENE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PREPARING STYRENE AND BENZENE WHICH COMPRISES HEATING A MIXTURE IN A MOLAR RATIO OF 1.5:1 TO 20:1 OF ACETYLENE AND MONOVINYLACETYLENE TO A TEMPERATURE OF 40* TO 150*C. UNDER A PRESSURE WITHIN THE RANGE OF 70 TO 700 LBS/SQ. IN. IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, ACETONITRILE AND TETRAHYDROFURAN, THE PRESENCE OF TRIPHENYLPHOSPHINE NICKEL-BICARBONYL AS CATALYST, AND RECOVERING STYRENE AND BENZENE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2163223A
Cited
US2161645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |