US3231547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefinic hydrocarbons
Assignee: Polysar Ltd
•
Filing: 1961-04-03
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Granted: 1966-01-25
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Darcy Jules
- 👤 Raymond A Stewart
- 👤 Lloyd A Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS COMPRISING CONTACTING 75.0-99.9 PARTS BY WEIGHT OF ISOBUTYLENE WITH 0.1-25.0 PARTS BY WEIGHT OF A CONJUGATED DIOLEFINIC COMPOUND CONTAINING A VINYLIDENE GROUP IN THE PRESENCE OF A CATALYST FORMED BY MIXING A REDUCIBLE METAL COMPOUND OF A HEAVY METAL FROM GROUPS IVB, VB AND VIB OF THE PERIODIC TABLE WITH AN ORGANOMETALLIC REDUCING COMPOUND BASED ON A METAL FROM GROUP IIIA OF THE PERIODIC TABLE, THE MOLAR RATIO OF SAID ORGANOMETALLIC REDUCING COMPOUND TO SAID REDUCIBLE HEAVY METAL COMPOUND BEING LESS THAN 1.0, AT A TEMPERATURE LOWER THAN 0*C., AND IN THE PRESENCE OF LESS THAN 100 PARTS BY WEIGHT OF INERT REACTION DILUENT PER 100 PARTS BY WEIGHT OF POLYMERIZABLE HYDROCARBONS.
Claim 2
Dependent Claim
114 words
A PROCESS COMPRISING CONTACTING 75.0-99.9 PARTS BY WEIGHT OF ISOBUTYLENE WITH 0.1-25.0 PARTS BY WEIGHT OF A CONJUGATED DIOLEFINIC COMPOUND CONTAINING A VINYLIDENE GROUP IN THE PRESENCE OF A CATALYST FORMED BY MIXING A REDUCIBLE METAL COMPOUND OF A HEAVY METAL FROM GROUPS IVB, VB AND VIB OF THE PERIODIC TABLE WITH AN ORGANOMETALLIC REDUCING COMPOUND BASED ON A METAL FROM GROUP IIIA OF THE PERIODIC TABLE, THE MOLAR RATIO OF SAID ORGANOMETALLIC REDUCING COMPOUND TO SAID REDUCIBLE HEAVY METAL COMPOUND BEING LESS THAN 1.0, AT A TEMPERATURE LOWER THAN 0*C., AND IN THE PRESENCE OF LESS THAN 100 PARTS BY WEIGHT OF INERT REACTION DILUENT PER 100 PARTS BY WEIGHT OF POLYMERIZABLE HYDROCARBONS.
References Cited (Backward Citations)
US2356128A
Cited
US2682531A
Cited
GB827365A
Cited
US3058963A
Cited
US2892826A
Cited
US2999089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |