US3272876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloolefin production
Assignee: Columbian Carbon Co
•
Filing: 1962-06-14
•
Granted: 1966-09-13
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Expires: 1982-06-14
Abstract
No abstract record available.
Inventors
- 👤 Levine Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:55
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/22; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/902; Y10S585/949; Y10S585/954; Y10S585/955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A METHOD OF CONTINUOUSLY REACTING SUBSTITUTED OR UNSUBSTITUTED CONJUGATED OPEN-CHAIN DIOLEFINS TO GIVE A POLYOLEFINIC CYCLOOLIGOMER OF SAID DIOLEFIN, SAID CYCLOOLIGOMER HAVING AT LEAST EIGHT CYCLIC CARBON ATOMS, WHICH METHOD COMPRISES THE STEPS OF CONTINUOUSLY INTRODUCING SAID DIOLEFIN INTO A REACTION ZONE, INTRODUCING A CATALYST INTO SAID REACTION ZONE, SAID CATALYST COMPRISING ZEROVALENT NICKEL AND HAVING THE EMPIRICAL FORMULA
Claim 2
Dependent Claim
60 words
IN A METHOD OF CONTINUOUSLY REACTING SUBSTITUTED OR UNSUBSTITUTED CONJUGATED OPEN-CHAIN DIOLEFINS TO GIVE A POLYOLEFINIC CYCLOOLIGOMER OF SAID DIOLEFIN, SAID CYCLOOLIGOMER HAVING AT LEAST EIGHT CYCLIC CARBON ATOMS, WHICH METHOD COMPRISES THE STEPS OF CONTINUOUSLY INTRODUCING SAID DIOLEFIN INTO A REACTION ZONE, INTRODUCING A CATALYST INTO SAID REACTION ZONE, SAID CATALYST COMPRISING ZEROVALENT NICKEL AND HAVING THE EMPIRICAL FORMULA
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |