USRE27401E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked hydrophilic polymers and articles made therefrom
Assignee: —
•
Filing: 1970-08-05
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Granted: 1972-06-20
•
Expires: 1990-08-05
Abstract
Abstract A MAJOR PORTION OF A MONOESTER OF ACRYLIC OR METHARYLIC ACID WITH A BI-FUNCTIONAL ALCOHOL WHICH HAS AN ESTERFIABLE HYDROXYL GROUP AND AT LEAST ONE ADDITIONAL HYDROPHILIC FUNCTIONAL GROUP IS COPOLYMERIZED IN AQUEOUS SOLUTION WITH A SMALL AMOUNT OF A DIESTER OF THESE ACIDS AND OF AN ALCOHOL WHICH HAS AT LEAST TWO ESTERIFIABLE HYDROXYL GROUPS UNTIL A SHAPE RETAINING BODY IS OBTAINED.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0006; A; A61; A61F; A61F6/00; A61F6/06; A61F6/08; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676; B01D69/00; B01D71/00; B01D71/06; B01D71/40; B01D71/401; B29; B29C; B29C39/00; C; C08; C08F; C08F20/00; C08F20/62; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/26; C08F220/28; C08F220/285; C08F220/286; C08F8/00; C08F8/14; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C08F2810/00; C08F2810/20; C08F2810/30
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |