Patent US2544808A successfully refreshed from Google Patents.
US2544808A
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Dimerization of butadiene
Assignee: Beazer East Inc
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Filing: 1947-09-25
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Granted: 1951-03-13
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Expires: 1967-09-25
Abstract
No abstract record available.
Inventors
- 👤 Eldon E Stahly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:54
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; C; C07; C07C; C07C2/00; C07C2/02; C07C2/50; C07C2/52; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/324; B01J2231/326; C07C2531/00; C07C2531/02; C07C2531/04; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS OF DIMERIZING BUTADIENE-1,3 TO PRODUCE 4-VINYLCYCLOHEXENE-1 COMPRISING: HEATING THE BUTADIENE IN LIQUID PHASE AT A PRESSURE OF 40 TO 1000 ATMOSPHERES AT A TEMPERATURE OF 150* TO 160* C. FOR A PERIOD OF A FEW MINUTES IN THE PRESENCE OF A METAL NAPHTHENATE SALT CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER NAPHTHENATE AND CHROMIUM NAPHTHENATE TO OBTAIN A DIMER YIELD IN EXCESS OF 63% BY WEIGHT OF BUTADIENE TREATED.
Claim 2
Dependent Claim
72 words
A PROCESS OF DIMERIZING BUTADIENE-1,3 TO PRODUCE 4-VINYLCYCLOHEXENE-1 COMPRISING: HEATING THE BUTADIENE IN LIQUID PHASE AT A PRESSURE OF 40 TO 1000 ATMOSPHERES AT A TEMPERATURE OF 150* TO 160* C. FOR A PERIOD OF A FEW MINUTES IN THE PRESENCE OF A METAL NAPHTHENATE SALT CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER NAPHTHENATE AND CHROMIUM NAPHTHENATE TO OBTAIN A DIMER YIELD IN EXCESS OF 63% BY WEIGHT OF BUTADIENE TREATED.
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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |