US3629221A
Expired / Lapsed
US
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Process for manufacturing polymers of dicyclopentadiene derivatives
Assignee: Arakawa Rinsan Kagaku Kogyo KK
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Filing: 1970-06-02
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Granted: 1971-12-21
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Expires: 1990-06-02
Abstract
Abstract A PROCESS FOR MAUNFACTURING A POLYMER OF DICYCLOPENTADIENE DERIVATIVE COMPRISES HYDROGENATING DICYCLOPENTADIENE TO PRODUCE DIHYDRODICYLOPENTADIENE AND POLYMERIZING THE RESULTANT DIHYDRODICYCLOPENTADIENE IN THE PRESENCE OF A METAL HALIDE CATALYST.
Inventors
- 👤 Morimasa Arakawa
- 👤 Akisato Katanosaka
- 👤 Masafumi Chikazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:04
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |