Patent US3251815A successfully refreshed from Google Patents.
US3251815A
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Polymerization of one or more conjugated diolefins with a catalyst consisting of vocl3
Assignee: Teijin Ltd
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Filing: 1963-02-27
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Granted: 1966-05-17
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Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 Yamada Noboru
- 👤 Shimada Keizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:26
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF PREPARING A SOLID OR RUBBERY POLYMER FROM AT LEAST AN ALIPHATIC CONJUGATED DIOLEFIN, OR MIXTURES THEREOF, WHICH COMPRISES POLYMERIZING SAID ALIPHATIC CONJUGATED DIOLEFIN, OR MIXTURES THEREOF, IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND A CATALYST CONSISTING OF VOCL3, SAID VOCL3 BEING IN AN AMOUNT OF 0.1 TO 10% BASED ON THE TOTAL WEIGHT OF SAID ALIPHATGIC CONJUGATED DIOLEFINS TO BE POLYMERIZED AND THE SAID INERT ORGANIC SOLVENT.
Claim 2
Independent Claim
72 words
A METHOD OF PREPARING A SOLID OR RUBBERY POLYMER FROM AT LEAST AN ALIPHATIC CONJUGATED DIOLEFIN, OR MIXTURES THEREOF, WHICH COMPRISES POLYMERIZING SAID ALIPHATIC CONJUGATED DIOLEFIN, OR MIXTURES THEREOF, IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND A CATALYST CONSISTING OF VOCL3, SAID VOCL3 BEING IN AN AMOUNT OF 0.1 TO 10% BASED ON THE TOTAL WEIGHT OF SAID ALIPHATGIC CONJUGATED DIOLEFINS TO BE POLYMERIZED AND THE SAID INERT ORGANIC SOLVENT.
References Cited (Backward Citations)
US2085535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |