US3285891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen-free polymerization catalysts
Assignee: Cabot Corp
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Filing: 1964-01-09
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Granted: 1966-11-15
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Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Victor D Aftandilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04; C08F2410/00; C08F2410/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR POLYMERIZING A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF A MONO-OLEFIN, MIXTURES OF MONOOLEFINS, A DI-OLEFIN, MIXTURES OF DI-OLEFINS AND MIXTURES THEREOF WHICH COMPRISES CONTACTING SAID SUBSTANCE AT TEMPERATURES BETWEEM ABPIT -25*C. AND 250*C., EITH A CATALYST COMPRISING (A) A SUBSTANTIALLY NONPOROUS, FINELY-DIVIDED INORGANIC SOLID HAVING AN AVERAGE PARTICLES DIAMETER OF LESS THAN ABOUT 00.1 MICRON AND CARRYING IN CHEMICAL COMBINATION BETWEEN ABOUT 5X10-4 AND ABOUT 4X10-3 EQUIVALENTS PER GRAM OF SURFACE STRUCTURES CONFORMING TO THE FORMULA
Claim 2
Dependent Claim
80 words
A PROCESS FOR POLYMERIZING A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF A MONO-OLEFIN, MIXTURES OF MONOOLEFINS, A DI-OLEFIN, MIXTURES OF DI-OLEFINS AND MIXTURES THEREOF WHICH COMPRISES CONTACTING SAID SUBSTANCE AT TEMPERATURES BETWEEM ABPIT -25*C. AND 250*C., EITH A CATALYST COMPRISING (A) A SUBSTANTIALLY NONPOROUS, FINELY-DIVIDED INORGANIC SOLID HAVING AN AVERAGE PARTICLES DIAMETER OF LESS THAN ABOUT 00.1 MICRON AND CARRYING IN CHEMICAL COMBINATION BETWEEN ABOUT 5X10-4 AND ABOUT 4X10-3 EQUIVALENTS PER GRAM OF SURFACE STRUCTURES CONFORMING TO THE FORMULA
References Cited (Backward Citations)
US3166542A
Cited
US3166543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |