US3563710A
Expired / Lapsed
US
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Polymerization apparatus
Assignee: Monsanto Co
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Filing: 1968-02-16
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Granted: 1971-02-16
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Expires: 1988-02-16
Abstract
Abstract A CONTINUOUS POLYMERIZATION APPARATUS SPECIFICALLY CONSTRUCTED TO PROVIDE FOR CONTROLLED TEMPERATURE, UNIFORM MIXING, AND EXCELLENT SURFACE GENERATION AND FILM FORMATION, HAVING JUXTAPOSED ROTOR AND STATOR SURFACES WITH A CIRCULATING HEAT TRANSFER MEDIUM THEREIN, THEREBY PROVIDING, IN CONJUNCTION WITH HEAT TRANSFER MEDIUM TEMPERATURE CONTROL, MEANS TO MIX THE POLYMER AND TO PROVIDE FINITE TEMPERATURE CONTROL OF THE JUXTAPOSED SURFACES AS WELL AS MEANS TO FORWARD THE POLYMER TOWARD THE EXIT END OF THE REACTION CHAMGER; THEREBY TO PRODUCE EXTREMELY HIGH VISCOSITY HIGH MOLECULAR WEIGHT POLYMERS.
Inventors
- 👤 William F Dew Jr
- 👤 Allen E Leybourne
- 👤 Robert E Colwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:39
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/04; B; B01; B01F; B01F27/00; B01F27/60; B01F35/00; B01F35/10; B01F35/145; B01F35/90; B01F35/95; B01J; B01J19/00; B01J19/18; F28D; F28D11/00; F28D11/02; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00087; B01J2219/00094; B01J2219/00164; B01J2219/18; B01J2219/182
Claims Analysis
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |