Patent US3792073A successfully refreshed from Google Patents.
US3792073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of siloxaneoxyalkylene polymers
Assignee: Union Carbide Corp
•
Filing: 1972-05-10
•
Granted: 1974-02-12
•
Expires: 1992-05-10
Abstract
Abstract PROCESS FOR PREPARING SILOXANEOXYALKYLENE BLOCK COPOLYMERS COMPRISING REACTING AN AMINO-CONTAINING SILOXANE POLYMER WITH A POLYOXYALKYLENE HYDROXY COMPOUND IN THE PRESENCE OF CARBON DIOXIDE OR BY REACTING A CARBAMATECONTAINING SILOXANE POLYMER WITH A POLYOXYALKYLENE HYDROXY COMPOUND.
Inventors
- 👤 B Prokai
- 👤 B Kanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/46
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |