USRE27541E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table ii
Assignee: —
•
Filing: 1971-11-18
•
Granted: 1973-01-09
•
Expires: 1991-11-18
Abstract
Abstract COMPOUNDS OF THE FORMULA (ME-)3SI-O(-SI(-ME)2-O)X(-SI(-ME)(-R-(O-C2H4)N(-O-C3H6)M- O-R'')-O)Y-SI(-ME)3 USEFUL AS FOAM STABILIZERS FOR FLEXIBLE POLYURETHANE FOAMS ARE DISCLOSED. IN THE ABOVE FORMULA R1 IS MONOVALENT HYDROCARBON, R IS ALKYLENE OF AT LEAST 2 CARBON ATOMS. THE SUM OF M+N IS SUCH THAT THE OXYALKYLENE BLOCK HAS A MOLECULAR WEIGHT OF AT LEAST 1500, X IS AT LEAST 40, AND Y IS AT LEAST 3.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2375/08; C08J2483/00
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |