Patent US3170904A successfully refreshed from Google Patents.
US3170904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cis-1, 4 polybutadiene with a ni-bf3 etherate-air3 catalyst
Assignee: Bridgestone Corp
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Filing: 1960-11-21
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Granted: 1965-02-23
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Expires: 1980-11-21
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
2026-10-30 07:50
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR MANUFACTURING CIS-1,4 POLYBUTADIENE, WHICH COMPRISES POLYMERIZING BUTADIENE IN LIQUID PHASE AT A TEMPERATURE BETWEEN -50*C., AND 150*C., UNDER A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION SYSTEM IN LIQUID PHASE AND IN AN INERT ATMOSPHERE TO A SOLID POLYMER HAVING A HIGH CONTENT OF CIS-1,4-CONFIGURATION AND SUBSTANTIALLY NO GEL BY USING A CATALYST ESSENTIALLY CONSISTING OF (A) METALLIC NICKEL HAVING A LARGE SURFACE AREA FOR ITS WEIGHT, (B) BORON TRIFULORIDE ETHERATE, AND (C) TRIALKYL ALUMINUM; THE MOL RATIO OF THE (C) COMPONENT TO THE (B) COMPONENT BEING BETWEEN ABOUT 0.1 TO ABOUT 5; AND THE AMOUNT OF (A) COMPONENT BEING ABOUT 0.1 TO ABOUT 10 GRAM ATOMS PER 1 MOL OF (B) COMPONENT.
Claim 2
Dependent Claim
115 words
A PROCESS FOR MANUFACTURING CIS-1,4 POLYBUTADIENE, WHICH COMPRISES POLYMERIZING BUTADIENE IN LIQUID PHASE AT A TEMPERATURE BETWEEN -50*C., AND 150*C., UNDER A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION SYSTEM IN LIQUID PHASE AND IN AN INERT ATMOSPHERE TO A SOLID POLYMER HAVING A HIGH CONTENT OF CIS-1,4-CONFIGURATION AND SUBSTANTIALLY NO GEL BY USING A CATALYST ESSENTIALLY CONSISTING OF (A) METALLIC NICKEL HAVING A LARGE SURFACE AREA FOR ITS WEIGHT, (B) BORON TRIFULORIDE ETHERATE, AND (C) TRIALKYL ALUMINUM; THE MOL RATIO OF THE (C) COMPONENT TO THE (B) COMPONENT BEING BETWEEN ABOUT 0.1 TO ABOUT 5; AND THE AMOUNT OF (A) COMPONENT BEING ABOUT 0.1 TO ABOUT 10 GRAM ATOMS PER 1 MOL OF (B) COMPONENT.
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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) | 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 |