US3703486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for foaming organic liquids
Assignee: Dow Silicones Corp
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Filing: 1969-08-27
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Granted: 1972-11-21
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Expires: 1989-08-27
Abstract
Abstract A PROCESS IS DISCLOSED FOR PREPARING A FOAM WHICH COMPRISES ADDING AT LEAST 0.1% BY WEIGHT OF A COPOLYMER CONSISTING ESSENTIALLY OF SIO2 UNITS AND UNITS SELECTED FROM THE GROUP CONSISTING OF (CH3)3SIO1/2 AND Q(CH3)2CIO1/2 UNITS, WHEREIN Q IS A RADICAL CONTAINING A SOLUBILIZING GROUP THAT MAKES THE COPOLYMER COMPATIBLE WITH THE MATERIAL TO WHICH IT IS ADDED, AND THE RATIO OF SIO2 UNITS TO THE TOTAL (CH3SI AND Q(CH3)2SI UNITS IS IN THE RANGE OF 1:0.6 TO 1:2, TO AN ORGANIC LIQUID HAVING A SURFACE TENSION OF AT LEAST 22.2 DYNES PER CENTIMETER AT 20*C. WHEN IN CONTACT WITH AIR, AND THEN EXPANDING SAID LIQUID WITH A GAS.
Inventors
- 👤 Joseph W Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:50
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; B; B32; B32B; B32B27/00; B41; B41M; B41M5/00; B41M5/124; B41M5/132; C08J9/30; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L63/00; C09; C09K; C09K23/00; C09K23/54; D; D06; D06M; D06M23/00; D06M23/04; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C08J2357/00; C08J2483/00; C08J2483/04; C08L83/00; C08L83/04
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |