US3625658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the polymerization and copolymerization of olefins including a closed circuit tubular reactor and support device therefor
Assignee: Solvay SA
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Filing: 1969-05-12
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Granted: 1971-12-07
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Expires: 1989-05-12
Abstract
Abstract THE APPARATUS FOR LOW-PRESSURE POLYMERIZATION INCLUDES A CLOSED CIRCUIT TUBULAR REACTOR, A PUMP TO CIRCULATE THE DISPERSING MEDIUM FOR THE POLYMERIZATION OR COPOLYMERIZATION AND A SUPPORT DEVICE FOR THE REACTOR PROVIDED WITH MEANS FOR PERMITTING FREE MOVEMENT IN THE PLANE OF THE REACTOR. BY PROVIDING FOR FREE MOVEMENT IN THE PLANE OF THE REACTOR, PERMANENT DEFORMATIONS OF THE REACTOR ASSEMBLY, DUE TO HEAT STRESS ARE AVOIDED.
Inventors
- 👤 Andre Closon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/16; F16L3/20; B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S248/00; Y10S248/901
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |