US3488340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process in application of b.b fraction as butadiene source for preparation of polymer derived from living polybutadiene
Assignee: Nippon Soda Co Ltd
•
Filing: 1965-04-07
•
Granted: 1970-01-06
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Expires: 1985-04-07
Abstract
No abstract record available.
Inventors
- 👤 Michio Hiraoka
- 👤 Yasukuni Kobayashi
- 👤 Takenobu Takase
- 👤 Akira Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:21
CPC Classifications
C; C08; C08F; C08F240/00; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C08F36/00; C08F36/02; C08F36/04; C08F36/06; C07C2523/00; C07C2523/02; C07C2523/04; C07C2531/00; C07C2531/02; Y; Y10; Y10S; Y10S526/00; Y10S526/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA520873A
Cited
US2181771A
Cited
US2264811A
Cited
US3317918A
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US3105828A
Cited
US3135716A
Cited
US3157604A
Cited
US3307785A
Cited
US3346666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |