US2631173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cyclooctadiene
Assignee: Phillips Petroleum Co
•
Filing: 1949-01-04
•
Granted: 1953-03-10
•
Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 John C Hillyer
- 👤 James V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:24
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2601/00; C07C2601/18; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE PRODUCTION OF 1,5-CYCLOOCTADIENE WHICH COMPRISES PASSING 1,3-BUTADIENE IN VAPOR PHASE THROUGH AN EMPTY TUBE IN THE ABSENCE OF A POLYMERIZATION INHIBITOR AND IN THE ABSENCE OF A CATALYST AT A COMBINATION OF REACTION CONDITIONS WITHIN THE RANGES OF 600 TO 1100* F., 20 TO 250 POUNDS PER SQUARE INCH ABSOLUTE, AND 1 TO 50 SECONDS SUCH AS TO CONVERT NOT IN EXCESS OF 35 PER CENT OF SAID BUTADIENE TO MATERIALS OTHER THAN BUTADIENE, AND RECOVERING 1,5-CYCLOOCTADIENE FROM CONVERSION PRODUCTS LOWER BOILING AND HIGHER BOILING THAN SAID 1,5CYCLOOCTADIENE.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE PRODUCTION OF 1,5-CYCLOOCTADIENE WHICH COMPRISES PASSING 1,3-BUTADIENE IN VAPOR PHASE THROUGH AN EMPTY TUBE IN THE ABSENCE OF A POLYMERIZATION INHIBITOR AND IN THE ABSENCE OF A CATALYST AT A COMBINATION OF REACTION CONDITIONS WITHIN THE RANGES OF 600 TO 1100* F., 20 TO 250 POUNDS PER SQUARE INCH ABSOLUTE, AND 1 TO 50 SECONDS SUCH AS TO CONVERT NOT IN EXCESS OF 35 PER CENT OF SAID BUTADIENE TO MATERIALS OTHER THAN BUTADIENE, AND RECOVERING 1,5-CYCLOOCTADIENE FROM CONVERSION PRODUCTS LOWER BOILING AND HIGHER BOILING THAN SAID 1,5CYCLOOCTADIENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |