US3661964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing aminoalkylalkoxy siloxanes
Assignee: Midland Silicones Ltd
•
Filing: 1970-07-17
•
Granted: 1972-05-09
•
Expires: 1990-07-17
Abstract
Abstract SILOXANE POLYMER CONTAINING BOTH AMINOALKYL AND ALKOXY SUBSTITUENTS ARE DEFINED BY THE GENERAL FORMULA R3SIO(CH3R''SIO)X(CH3R"SIO)Y(R$2SIO)XSIR3 WHERE R AND R"" ARE HYDROCARBYL RADICALS, R'' IS AN ALKOXY OR ALKOXYALKOXY OF LESS THAN 6 CARBON ATOMS, R" IS -XNY2 WHERE X IS ALKYLENE OF 3-20 CARBON ATOMS, THE NITROGEN BEING AT LEAST 3 CARBONS REMOVED FROM SI,Y IS HYDROGEN HYDROCARBLY OR TRIHYDROCARBYLISIYL, X IS 5 TO 95, Y IS 1 TO 50, Z IS UP TO 10% OF X+Y+Z IS 20 TO 100. THESE SILOXANES ARE USEFUL AS RELEASE AGENTS AND WATER REPELLENTS ON PAPER AND OTHER SUBSTRATES.
Inventors
- 👤 Brian J Griffiths
- 👤 Herbert T Cooper
- 👤 Peter F Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:03
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |