Patent US3413274A successfully refreshed from Google Patents.
US3413274A
Expired / Lapsed
US
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Polymerization process having improved alkyl boron initiators for ethylenically unsaturated compounds
Assignee: Toyo Koatsu Industries Inc
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Filing: 1965-08-20
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Granted: 1968-11-26
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Watanabe Hiroshi
- 👤 Kato Kinsuke
- 👤 Ito Shinji
- 👤 Murozono Hitoshi
- 👤 Nakakaki Toshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:54
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; C08F4/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3169947A
Cited
BE587761A
Cited
US3067185A
Cited
US3112298A
Cited
US3275611A
Cited
US3238186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |