Patent US3290401A successfully refreshed from Google Patents.
US3290401A
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Cyclooligomerization of 1, 3-dienes
Assignee: Eastman Kodak Co
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Filing: 1965-04-05
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Granted: 1966-12-06
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Marvin A Mccall
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:00
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2286; B01J31/2295; B01J31/24; B01J31/2404; C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2/50; C07C2/52; C07F; C07F15/00; C07F15/04; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/324; B01J2231/326; B01J2231/328; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; B01J31/02; B01J31/12; B01J31/122; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/16; C07C2531/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
IN A PROCES FOR PREPARING CYCLIC OLIGOMERS BY CONTACTING A 1,3-DIENE WITH A CATAYLST, THE NOVEL PROCEDURE WHICH COMPRISES EMPLOYING AS A CATALYST IN SAID PROCESS A COMPLEXED DIVALENT ORGANO-NICKEL COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
34 words
IN A PROCES FOR PREPARING CYCLIC OLIGOMERS BY CONTACTING A 1,3-DIENE WITH A CATAYLST, THE NOVEL PROCEDURE WHICH COMPRISES EMPLOYING AS A CATALYST IN SAID PROCESS A COMPLEXED DIVALENT ORGANO-NICKEL COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US3148224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |