US3794471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous polymerization apparatus
Assignee: Monsanto Co
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Filing: 1971-08-16
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Granted: 1974-02-26
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Expires: 1991-08-16
Abstract
Abstract APPARATUS FOR CONTINUOUS MASS POLYMERIZATION UNDER CONDITIONS WHICH ARE SUBSTANTIALLY ISOTHERMAL AND SUBSTANTIALLY HOMOGENEOUS WITH RESPECT TO COMPOSITION ADAPTED FOR USE WITH HIGH VISCOSITY POLYMERIZING FLUID MASSES WITH A VAPOR SPACE THEREABOVE WITH REMARKABLY HIGH RATES OF THERMAL ENERGY REMOVAL. THE APPARATUS EMPLOYS A REACTOR WHEREIN THERE IS A PADDLE ASSEMBLY ADAPTED TO PRODUCE IN A HIGHLY VISCOUS FLUID A COMBINATION OF CYCLICAL VERTICAL MIXING, ROLLING ACTION AND AXIAL RECIRCULATION. THE REACTOR IS EQUIPPED WITH A REFLUX CONDENSER AND CONTROL MEANS REGULATING THE AMOUNT OF POLYMER WITHDRAWN FROM THE REACTOR WHEN IN USE DURING POLYMERIZATION.
Inventors
- 👤 G Latinen
- 👤 M Latinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:40
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/60; B01F35/00; B01F27/05; B01F27/11; B01F27/112; B01F27/1125; B01F27/11251; B01J2219/00; B01J2219/18; B01J2219/182; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S526/00; Y10S526/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |