US3686024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a water-absorbent coated article and resultant product
Assignee: Dow Chemical Co
•
Filing: 1970-02-24
•
Granted: 1972-08-22
•
Expires: 1990-02-24
Abstract
Abstract WATER-ABSORBENT COATED ARTICLES ARE PREPARED BY CONTACTING A FIBROUS MATERIAL WITH A WATER-SWOLLEN GEL AND DRYING THE COATED MATERIAL THEREBY OBTAINED. ADHERENCE OF THE GEL IS IMPROVED BY PRETREATMENT OF THE FIBROUS BASE WITH A CATIONIC POLYMER SUCH AS POLYETHYLENIMINE. FABRICS COATED WITH GELS SUCH AS CROSS-LINKED PARTIALLY HYDROLYZED POLYACRYLAMIDE ARE USEFUL IN VARIOUS APPLICATIONS WHERE IT IS DESIRABLE TO HOLD OR ABSORB AN AQUEOUS FLUID IN A PARTICULAR LOCATION.
Inventors
- 👤 Robert J Nankee
- 👤 Jack C Lamphere
- 👤 Rodney A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:51
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; E; E04; E04D; E04D5/00; E04D5/02; E04D5/10; C; C08; C08L; C08L33/00; C08L33/24; C08L33/26; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2762; Y10T442/277; Y10T442/2811
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |