US3155642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst compositions
Assignee: Shell USA Inc
•
Filing: 1961-04-24
•
Granted: 1964-11-03
•
Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Edward W Duck
- 👤 Jacques A Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
THE REACTION PRODUCT OF AN ALUMINUM HALIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM BROMIDE, A HYDROCARBYL STANNANE OF THE FORMULA
Claim 2
Dependent Claim
24 words
THE REACTION PRODUCT OF AN ALUMINUM HALIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM BROMIDE, A HYDROCARBYL STANNANE OF THE FORMULA
Claim 3
Dependent Claim
47 words
IN THE PROCESS FOR THE POLYMERIZATION OF A CONJUGATED DIENE OF THE GROUP CONSISTING OF BUTADIENE AND ISOPRENE AT TEMPERATURES IN THE RANGE FROM ABOUT -20* C. TO 150*C., THE INVENTION COMPRISING CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF A POLYMERIZAITON CATALYST ACCORDING TO CLAIM 1.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |