US3522332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 1,2-polybutadiene
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-05-29
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Granted: 1970-07-28
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Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Mitsuo Ichikawa
- 👤 Yasumasa Takeuchi
- 👤 Akira Kogure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
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) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |