US2575341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of butadiene from cyclohexane pyrolate
Assignee: Beazer East Inc
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Filing: 1946-01-24
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Granted: 1951-11-20
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Expires: 1966-01-24
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Gollmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:20
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE MANUFACTURE OF BUTADINE BY THE PYROLYSIS OF CYCLOHEXANE THE METHOD OF RECOVERING BUTADINE ESSENTIALLY FREE OF OTHER PRODUCTS OF THE PYROLYSIS WHICH COMPRISES SCRUBBING THE BUTADINE-CONTAINING GASEOUS PRODUCTS OF THE PYROLYSIS WITH AN ABSORBENT CONSISTING ESSENTIALLY OF A LOW FREEZING POINT MIXTURE OF CYCLOHEXANE AND BENZENE, COOLING AND COMPRESSING THE EFFLUENT GASES FROM SAID SCRUBBING TO CONDENSE ANY CYCLOHEXANE AND BENZENE ENTRAINED THEREIN, RETURNING THE CONDENSATE TO THE ABSORBENT AND RECOVERING BUTADIENE FROM THE LIQUID EFFLUENT OF SAID SCRUBBING.
Claim 2
Dependent Claim
81 words
IN THE MANUFACTURE OF BUTADINE BY THE PYROLYSIS OF CYCLOHEXANE THE METHOD OF RECOVERING BUTADINE ESSENTIALLY FREE OF OTHER PRODUCTS OF THE PYROLYSIS WHICH COMPRISES SCRUBBING THE BUTADINE-CONTAINING GASEOUS PRODUCTS OF THE PYROLYSIS WITH AN ABSORBENT CONSISTING ESSENTIALLY OF A LOW FREEZING POINT MIXTURE OF CYCLOHEXANE AND BENZENE, COOLING AND COMPRESSING THE EFFLUENT GASES FROM SAID SCRUBBING TO CONDENSE ANY CYCLOHEXANE AND BENZENE ENTRAINED THEREIN, RETURNING THE CONDENSATE TO THE ABSORBENT AND RECOVERING BUTADIENE FROM THE LIQUID EFFLUENT OF SAID SCRUBBING.
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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |