US3810841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soap impregnated resilient polyurethane foams
Assignee: Wyeth Holdings LLC
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Filing: 1972-03-31
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Granted: 1974-05-14
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Expires: 1992-03-31
Abstract
Abstract FLEXIBLE POLYURETHAANE SPONGS, HAVING A DDRY BLAND SOAP INTEGRALLY INCORPORATED THEREIN, ARE PROVIDED BY FORMING AND FOAMING A MIXTURE COMPRISING A POLYESTER WITH A HYDROXYL NUMBER OF 40 TO 80, A MOLECULAR WEIGHT OF 2,000 TO 6,000 AND A CARBOXY NUMBER OF LESS THAN 1.5; AN AROMATIC DIISOCYANATE; WATER; A BASIC CATALYST; AND FINELY DIVIDED AND INTIMATELY MIXED BLAND SOAP WITH OR WITHOUT AN EFFECTIVE AMOUNT OF A GERMICIDE IN AN AMOUNT EQUAL TO 25 TO 110% OF THE COMBINED WEIGHT OF THE POLYESTER AND THE DIISOCYANATE TO THEREBY FORM A SPONGE HAVING FROM 60 TO 100 PORES PER INCH AND THE SOAP EVENLY DISTRIBUTED THERETHROUGH, IN A FINELY SUBDIVIDED STATE.
Inventors
- 👤 F Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:13
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/049; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A47L13/17; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/425
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |