Patent US2985698A successfully refreshed from Google Patents.
US2985698A
Expired / Lapsed
US
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Process for pyrolyzing hydrocarbons
Assignee: Hoechst AG
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Filing: 1958-09-26
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Granted: 1961-05-23
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Expires: 1978-09-26
Abstract
No abstract record available.
Inventors
- 👤 Pechtold Nikolaus
- 👤 Wirtz Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:45
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE PROCESS FOR THE MANUFACTURE OF UNSATURATED C2 HYDROCARBONS BY INTRODUCING METHANE INTO A COMBUSTION GAS WHICH IS FREE FROM AN EXCESS OF MOLECULAR OXYGEN, THE IMPROVEMENT WHICH CONSISTS IN ADDING TO THE HOT GASEOUS MIXTURE THUS OBTAINED AND HAVING A TEMPERATURE IN THE RANGE FROM ABOUT 1600*C. TO ABOUT 1200*C., AT LEAST ONE PARAFFINIC HYDROCARBONS CONTAINING AT LEAST TWO CARBON ATOMS, IN AN ATOMIZED FORM, AND ADJUSTING THE TEMPERATURE OF THE HOT GASEOUS MIXTURE AFTER THE PYROLYSIS OF THE SAID PARAFFINIC HYDROCARBON TO A RANGE FROM ABOUT 1100*C. TO ABOUT 700*C. BY REGULATING THE AMOUNT OF SAID PARAFFINIC HYDROCARBON, AND CHILLING THE REACTED MIXTURE.
Claim 2
Dependent Claim
106 words
IN THE PROCESS FOR THE MANUFACTURE OF UNSATURATED C2 HYDROCARBONS BY INTRODUCING METHANE INTO A COMBUSTION GAS WHICH IS FREE FROM AN EXCESS OF MOLECULAR OXYGEN, THE IMPROVEMENT WHICH CONSISTS IN ADDING TO THE HOT GASEOUS MIXTURE THUS OBTAINED AND HAVING A TEMPERATURE IN THE RANGE FROM ABOUT 1600*C. TO ABOUT 1200*C., AT LEAST ONE PARAFFINIC HYDROCARBONS CONTAINING AT LEAST TWO CARBON ATOMS, IN AN ATOMIZED FORM, AND ADJUSTING THE TEMPERATURE OF THE HOT GASEOUS MIXTURE AFTER THE PYROLYSIS OF THE SAID PARAFFINIC HYDROCARBON TO A RANGE FROM ABOUT 1100*C. TO ABOUT 700*C. BY REGULATING THE AMOUNT OF SAID PARAFFINIC HYDROCARBON, AND CHILLING THE REACTED MIXTURE.
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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 |