US3793241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable hydrophilic foam and method of preparing same
Assignee: Individual
•
Filing: 1972-03-20
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Granted: 1974-02-19
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Expires: 1992-03-20
Abstract
Abstract RESILIENT, CROSSLINKED, HYDROPHILIC, OPEN-CELLED POLYOXYALKYLENE UREA/URETHANE FOAM COMPRISING HYDROPHILIC AND HYDOPHOBIC SEGMENTS OF RELATIVELY HIGH RESISTANCE TO BOTTOMING THE FOAMS HAVING RELATIVELY HIGH RESISTANCE TO BOTTOMING OUT AND GOOD DIMENSIONAL STBILITY WITH ABSORPTION OF WATER, AND A PROCESS FOR PREPARING THE SAME.
Inventors
- 👤 R Kyle
- 👤 J Kistner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/08; C08G18/10; C08G2110/00; C08G2110/0008; C08G2110/0033; C08G2110/0041; C08G2110/0058; C08G2110/0066; C08G2110/0083; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S521/914
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |