Patent US3535303A successfully refreshed from Google Patents.
US3535303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of unsaturated hydrocarbon polymers having a high percentage of vinyl opening configuration
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-08-05
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Granted: 1970-10-20
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Mitsuo Ichikawa
- 👤 Yasumasa Takeuchi
- 👤 Yoshitada Kagawa
- 👤 Masayuki Endoh
- 👤 Akira Kogure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
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) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |