US3586727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of substituted 8,10,and 12-member rings by the catalytic cooligomerization of unsaturated compounds
Assignee: Studiengesellschaft Kohle gGmbH
•
Filing: 1969-07-18
•
Granted: 1971-06-22
•
Expires: 1989-07-18
Abstract
Abstract PROCESS OF CYCLOCOOLIGOMERIZATION OF TWO DIFFERENT CONJUGATED DIENES TO PRODUCE ALICYCLIC PRODUCTS HAVING AT LEAST 8 CARBON ATOMS IN THE RING, AT LEAST TWO LOCATIONS OF OLEFINIC UNSATURATION IN THE RING, AND AT LEAST ONE SUBSTITUENT PENDENT FROM THE RING, WHICH PROCESS CYCLOCOOLIGOMERIZES THE TWO DIFFERENT CONJUGATED DIENES IN CONTACT WITH A CARBONYL-FREE, ZERO VALENT NICKEL COMPOUND CATALYST. MANY OF THE NEW PRODUCTS THUS FORMED BY THIS PROCESS ARE DESCRIBED, CHARACTERIZED, AND CLAIMED.
Inventors
- 👤 Gunther Wilke
- 👤 Paul Heimbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:06
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |