US3471462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic production of polybutadiene and catalysts therefor
Assignee: Mitsubishi Chemical Corp
•
Filing: 1965-04-22
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Granted: 1969-10-07
•
Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Tsuyoshi Matsumoto
- 👤 Tokuo Ito
- 👤 Kouei Komatsu
- 👤 Hidetoshi Yasunaga
- 👤 Kenichi Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:29
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/907
Claims Analysis
Total Claims: 0
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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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |