US3702860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea-functional organosilicon compounds
Assignee: Dow Silicones Corp
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Filing: 1970-10-12
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Granted: 1972-11-14
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Expires: 1990-10-12
Abstract
Abstract -R-N(-Q)-Z-NH-CO-NH2 IN WHICH R IS A DIVALENT HYDROCARBON RADICAL FREE OF ALIPHATIC UNSATURATION OF FROM 3-18 INCLUSIVE CARBON ATOMS, Z IS AN ETHYLENE, PROPYLENE, OR SUBSTITUTED ETHYLENE OR PROPYLENE RADICAL AND Q IS A HYDROGEN ATOM OR A UREA RADICAL, ARE USEFUL AS SIZING AGENTS FOR GLASS FIBERS AND AS ADDITIVES IN THE PREPARATION OF CREASE RESISTANT RESINS. SILANES AND SILOXANES HAVING UREA FUNCTIONALITY IN THE FORM OF A
Inventors
- 👤 Robert H Krahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:46
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |