US3813369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mass polymerization process
Assignee: Monsanto Co
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Filing: 1972-05-25
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Granted: 1974-05-28
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Expires: 1992-05-25
Abstract
Abstract AN IMPROVED PROCESS FOR COPOLYMERIZING BY CONTINUOUS MASS TECHNIQUE ALKENYL NITRILE COMPOUND(S) WITH MONOAKENYL AOMATIC COMPOUND(S) WHEREIN THE CAPABILITIES OF BOTH USING REFLUX AND OF ACHIEVING UNUSUALLY HIGH CONVERSION LEVELS WITH UNUSUALLY HIGH CONVERSION RATES ARE PROVIDED. THE PROCESS UTILIZES WITHIN A REACTION ZONE A COMBINATION OF HOMOGENEOUS MIXING AND VAPOR PHASE REMOVAL OF MONOMER TO CONTROL TEMPERATURE. COPOLYMERS PRODUCED BY THIS PROCESS DISPLAY SUBSTATIALLY UNIFORM MOLECULAR WEIGHT DISTRIBUTION AND COMPOSITION DISTRIBUTION.
Inventors
- 👤 G Latinen
- 👤 M Latinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F212/10; C08F20/00; C08F20/02; C08F20/42; B; B01; B01J; B01J2219/00; B01J2219/18; B01J2219/182; Y; Y10; Y10S; Y10S526/00; Y10S526/918
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |