US3565873A
Expired / Lapsed
US
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Method and apparatus for polymerizing monomeric materials
Assignee: DSM Copolymer Inc
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Filing: 1967-09-25
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Granted: 1971-02-23
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Expires: 1987-09-25
Abstract
Abstract THE RATIO OF MONOMERS, CONCENTRATION OF MONOMERS, CONCENTRATION OF POLYMER SOLIDS, MOLECULAR WEIGHT OF THE POLYMER, AND/OR TEMPERATURE OF THE POLYMERIZATION MIXTURE IN A CONTINUOUSLY OPERATED SOLUTION POLYMERIZATION REACTOR ARE SIMULTANEOUSLY AND EFFECTIVELY CONTROLLED BY A NOVEL METHOD AND IMPROVED APPARATUS.
Inventors
- 👤 John D Sutherland Jr
- 👤 Stanford E Groves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:03
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C08F36/00; C08F36/02; C08F36/04; C08F210/00; C08F210/16; C08F210/18
Claims Analysis
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |