Patent US3170907A successfully refreshed from Google Patents.
US3170907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cis-1, 4 polybutadiene with a nickel carboxylic acid salt-boron trifluoride etherate-aluminum trialkyl catalyst
Assignee: Bridgestone Corp
•
Filing: 1960-12-28
•
Granted: 1965-02-23
•
Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Ueda Kenichi
- 👤 Onishi Akira
- 👤 Yoshimoto Toshio
- 👤 Hosono Junichi
- 👤 Maeda Katsuhiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:48
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F236/00; C08F236/02; C08F236/04; C08F236/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR MANUFACTURING CIS-1,4 POLYBUTADIENE, WHICH COMPRISES: POLYMERIZING BUTADIENE IN THE PRESENCE OF HYDROCARBON DILUENT, AT A TEMPERATURE BETWEEN ABOUT -30*C. AND ABOUT 150*C., UNDER A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION SYSTEM IN LIQUID PHASE AND UNDER AN INERT ATMOSPHERE TO A SOLID POLYMER HAVING AT LEAST 70% CIS-1,4 STRUCTURE BY CONTACTING BUTADIENE WITH A CATALYST OBTAIED BY EFFECTING REACTION THROUGH MIXING AT A CONTROLLED TEMPERATURE THE THREE COMPONENTS CONSISTING OF (A) AN ORGANIC CARBOXYLIC ACID SALT OF NICKEL OF THE FORMULA
Claim 2
Dependent Claim
84 words
A PROCESS FOR MANUFACTURING CIS-1,4 POLYBUTADIENE, WHICH COMPRISES: POLYMERIZING BUTADIENE IN THE PRESENCE OF HYDROCARBON DILUENT, AT A TEMPERATURE BETWEEN ABOUT -30*C. AND ABOUT 150*C., UNDER A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION SYSTEM IN LIQUID PHASE AND UNDER AN INERT ATMOSPHERE TO A SOLID POLYMER HAVING AT LEAST 70% CIS-1,4 STRUCTURE BY CONTACTING BUTADIENE WITH A CATALYST OBTAIED BY EFFECTING REACTION THROUGH MIXING AT A CONTROLLED TEMPERATURE THE THREE COMPONENTS CONSISTING OF (A) AN ORGANIC CARBOXYLIC ACID SALT OF NICKEL OF THE FORMULA
References Cited (Backward Citations)
US2521022A
Cited
US2882264A
Cited
US2965626A
Cited
US2953554A
Cited
US2977349A
Cited
US2964627A
Cited
US2970134A
Cited
FR1215953A
Cited
US3094514A
Cited
GB837251A
Cited
US3066126A
Cited
BE580103A
Cited
US3066127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |