US3661860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic polyurethane
Assignee: Kimberly Clark Corp
•
Filing: 1970-05-11
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Granted: 1972-05-09
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Expires: 1990-05-11
Abstract
Abstract HYDROPHILIC POLYURETHANE SUITABLE AS ELASTIC FILM OR FOAM OF HIGH TENSILE STRENGTH IS PREPARED BY INTRODUCING A TERTINARY AMINE COPOLYMER SEGMENT WHICH IMPARTS HYDROPHILIC PROPERTIES WITHOUT REDUCING THE TENSILE STRENGTH OF THE RESULTING PRODUCT.
Inventors
- 👤 Eckhard C A Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5054; C08G18/506; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S521/914
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |