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Patent US3196188A successfully refreshed from Google Patents.
US3196188A
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Cyclopentadiene dimerization process
Assignee: Union Carbide Corp
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Filing: 1961-11-28
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Granted: 1965-07-20
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Stanton E Parrish
- 👤 Eugene F Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:19
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/50; C07C2603/00; C07C2603/56; C07C2603/58; C07C2603/60; C07C2603/66; C07C2603/68; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924; Y10S585/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS FOR THE DIMERIZATION OF A CONCENTRATED CYCLOPENTADIENE MONOMER HAVING FROM 5 TO 7 CARBON ATOMS WHICH COMPRISES HEATING SAID MONOMER IN THE LIQUID PHASE AND IN THE SUBSTANTIAL ABSENCE OF MONOMER VAPORS AT A TEMPERATURE OF FROM 110*C. TO 160*C. FOR FROM 3 TO 30 MINUTES, WHEREBY AT LEAST 50 PERCENT OF SAID MONOMER IS CONVERTED TO ITS DIMER AND THE FORMATION OF CYCLOPENTADIENE POLYMERS HIGHER THAN THE DIMER IS MINIMIZED.
Claim 2
Dependent Claim
73 words
THE PROCESS FOR THE DIMERIZATION OF A CONCENTRATED CYCLOPENTADIENE MONOMER HAVING FROM 5 TO 7 CARBON ATOMS WHICH COMPRISES HEATING SAID MONOMER IN THE LIQUID PHASE AND IN THE SUBSTANTIAL ABSENCE OF MONOMER VAPORS AT A TEMPERATURE OF FROM 110*C. TO 160*C. FOR FROM 3 TO 30 MINUTES, WHEREBY AT LEAST 50 PERCENT OF SAID MONOMER IS CONVERTED TO ITS DIMER AND THE FORMATION OF CYCLOPENTADIENE POLYMERS HIGHER THAN THE DIMER IS MINIMIZED.
References Cited (Backward Citations)
US2813135A
Cited
GB803308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |