US3296322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ortho-ethyltoluene
Assignee: Dow Chemical Co
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Filing: 1963-11-07
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Granted: 1967-01-03
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Soderquist
- 👤 James L Amos
- 👤 Robert H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:08
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A CONTINUOUS PROCESS FOR PREPARING ORTHO-ETHYLTOLUENE, WHICH PROCESS COMPRISES: (A) FEEDING ETHYLENE AND TOLUENE REACTANTS IN A RATIO OF ABOUT 1.5 TO 6.0 MOLES OF TOLUENE PER MOLE OF ETHYLENE, INTO A REACTION ZONE MAINTAINED AT A TEMPERATURE OF FROM ABOUT 20* TO 90*C., (B) PROVIDING A DISPERSION OF FROM ABOUT 1 TO 10 GRAMS OF AN ACTIVATED FRIEDEL-CRAFTS CATALYST PER MOLE OF TOLUENE FED TO SAID REACTION ZONE, (C) REMOVING ALL OF SAID ACTIVATED CATALYST SETTLING OUT OF SAID REACTION ZONE IN A NON-DISPERSED PHASE IMMEDIATELY UPON FORMATION THEREOF,
Claim 2
Dependent Claim
90 words
A CONTINUOUS PROCESS FOR PREPARING ORTHO-ETHYLTOLUENE, WHICH PROCESS COMPRISES: (A) FEEDING ETHYLENE AND TOLUENE REACTANTS IN A RATIO OF ABOUT 1.5 TO 6.0 MOLES OF TOLUENE PER MOLE OF ETHYLENE, INTO A REACTION ZONE MAINTAINED AT A TEMPERATURE OF FROM ABOUT 20* TO 90*C., (B) PROVIDING A DISPERSION OF FROM ABOUT 1 TO 10 GRAMS OF AN ACTIVATED FRIEDEL-CRAFTS CATALYST PER MOLE OF TOLUENE FED TO SAID REACTION ZONE, (C) REMOVING ALL OF SAID ACTIVATED CATALYST SETTLING OUT OF SAID REACTION ZONE IN A NON-DISPERSED PHASE IMMEDIATELY UPON FORMATION THEREOF,
References Cited (Backward Citations)
US2198595A
Cited
US2763702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |