US2686209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cyclo-olefinic compounds
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1952-10-31
•
Granted: 1954-08-10
•
Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Reed Hugh Wilma Boulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:20
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/22; C07C2601/00; C07C2601/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR THE PRODUCTION OF CYCLO-OLEFINIC COMPOUNDS CONTAINING EIGHT CARBON ATOMS IN THE RING, WHICH COMPRISES THE STEP OF CONTACTING AT ELEVATED TEMPERATURE A CONJUGATED OPEN CHAIN DI-OLEFINIC COMPOUND WITH A CATALYST HAVING THE FORMULA: ((RO)3P)XNI(CO)4-X WHEREIN R IS AN ORGANIC RADICAL AND X HAS A VALUE OF FROM 1 TO 2.
Claim 2
Dependent Claim
53 words
A PROCESS FOR THE PRODUCTION OF CYCLO-OLEFINIC COMPOUNDS CONTAINING EIGHT CARBON ATOMS IN THE RING, WHICH COMPRISES THE STEP OF CONTACTING AT ELEVATED TEMPERATURE A CONJUGATED OPEN CHAIN DI-OLEFINIC COMPOUND WITH A CATALYST HAVING THE FORMULA: ((RO)3P)XNI(CO)4-X WHEREIN R IS AN ORGANIC RADICAL AND X HAS A VALUE OF FROM 1 TO 2.
References Cited (Backward Citations)
US2631173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |