Patent US3871830A successfully refreshed from Google Patents.
US3871830A
Expired / Lapsed
US
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Polymerization reactor having a closed upper chamber portion of reduced diameter and polymerization process therein
Assignee: Solvay SA
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Filing: 1973-07-12
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Granted: 1975-03-18
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Expires: 1993-07-12
Abstract
Abstract A polymerization reactor constructed with a cylindrical vessel having a vertical axis and a coaxially disposed chimney at the upper end. A stirrer system is provided in the lower portion of the vessel. The ratio of the chimney inside diameter to the inside diameter of the cylindrical vessel is between 0.20 and about 0.33. The chimney has a volume exceeding 2.5 percent of the actual volume of the reactor.
Inventors
- 👤 Jean-Marie Chauvier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:26
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; B; B01; B01J; B01J19/00; B01J19/18; B01J2219/00; B01J2219/00049; B01J2219/00162; B01J2219/18; B01J2219/185; Y; Y10; Y10S; Y10S526/00; Y10S526/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A reactor as defined in claim 1 wherein the ratio of the upper chamber portion inside diameter to the inside diameter of the cylindrical vessel is between 0.25 and 0.30.
Claim 2
Dependent Claim
27 words
A reactor as defined in claim 1 wherein the volume of the upper chamber portion is less than 5 percent of the actual volume of the reactor.
References Cited (Backward Citations)
US3257171A
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US2573978A
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US2872298A
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US3127364A
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US3115333A
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US3131033A
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US3484204A
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US3631012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |