Patent US3575946A successfully refreshed from Google Patents.
US3575946A
Expired / Lapsed
US
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Method of preparing soluble polymers of ethylene glycol
Assignee: Czech Academy of Sciences
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Filing: 1967-05-17
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Granted: 1971-04-20
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Expires: 1987-05-17
Abstract
Abstract ETHYLENE GLYCOL MONOMETHACRYLATE AND OMONACRYLATE CONTAMINATED WITH UP TO 50% OF THE CORRESPONDING BISMETHACRYLATES OR BISACRYLATES MAY BE FULLY POLYMERIZED TO SOLVENT-SOLUBLE POLYMERS IN ALL SOLVENT MEDIA CAPABLE OF STRONGLY-SWELLING THE CROSS-LINKED COPOLYMER WHICH WOULD BE FORMED IF THE SAME MONOMER MIXTURE WERE POLYMERIZED IN THE ABSENCE OF SOLVENT.
Inventors
- 👤 Richard Chromecek
- 👤 Miloslav Bohdancky
- 👤 Karel Kliment
- 👤 Jaroslava Otoupalova
- 👤 Vladimir Stoy
- 👤 Miroslav Stol
- 👤 Zdenek Tuzar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:37
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/28; C08F20/20
Claims Analysis
Total Claims: 0
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |