US2591384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tri-and tetra-isobutylene
Assignee: Gulf Research and Development Co
•
Filing: 1947-12-04
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Granted: 1952-04-01
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Expires: 1967-12-04
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Robert S Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:21
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2531/00; C07C2531/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
THE PROCESS FOR PREPARING TRI-ISOBUTYLENE AND TETRA-ISOBUTYLENE WHICH COMPRISES REACTING ISOBUTYLENE WITH DI-ISOBUTYLENE AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 110* C. IN THE PRESENCE OF A CATALYTIC AMOUNT OF BORON TRIFLUORIDE-ETHER COMPLEX.
Claim 2
Dependent Claim
35 words
THE PROCESS FOR PREPARING TRI-ISOBUTYLENE AND TETRA-ISOBUTYLENE WHICH COMPRISES REACTING ISOBUTYLENE WITH DI-ISOBUTYLENE AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 110* C. IN THE PRESENCE OF A CATALYTIC AMOUNT OF BORON TRIFLUORIDE-ETHER COMPLEX.
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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |