US3314931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization in non-aqueous systems
Assignee: ConocoPhillips Co
•
Filing: 1961-03-06
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Granted: 1967-04-18
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Davis Pauls
- 👤 Oskar E H Klopfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:42
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE METHOD OF POLYMERIZING BUTADIENE WITH AN ALFIN CATALYST UNDER ANHYDROUS CONDITONS TO YIELD POLYBUTADIENE HAVIG A DILUTE SOLUTION VISCOSITY IN THE RANGE OF ABOUT 5 TO 10, THE IMPROVEMENT WHICH COMPRISES CONTACTING AT LEAST A PART OF THE BUTADIENE WITH THE CATALYST AND THEREAFTER ADDING TERTIARY ALKYL MERCAPTAN TO TEH POLYMERIZATION MASS WHEREBY THE EXTENT OF POLYMERIZATION OF THE BUTADIENE IS REGULATED BY THE ADDED MERCAPTAN.
Claim 2
Dependent Claim
68 words
IN THE METHOD OF POLYMERIZING BUTADIENE WITH AN ALFIN CATALYST UNDER ANHYDROUS CONDITONS TO YIELD POLYBUTADIENE HAVIG A DILUTE SOLUTION VISCOSITY IN THE RANGE OF ABOUT 5 TO 10, THE IMPROVEMENT WHICH COMPRISES CONTACTING AT LEAST A PART OF THE BUTADIENE WITH THE CATALYST AND THEREAFTER ADDING TERTIARY ALKYL MERCAPTAN TO TEH POLYMERIZATION MASS WHEREBY THE EXTENT OF POLYMERIZATION OF THE BUTADIENE IS REGULATED BY THE ADDED MERCAPTAN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |