US3752781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkylenimine urea aldehyde cationic resins
Assignee: Richardson Co
•
Filing: 1970-09-02
•
Granted: 1973-08-14
•
Expires: 1990-09-02
Abstract
Abstract A PROCESS FOR PREPARING NOVEL WATER SOLUBLE POLYALKYLENIMINE-UREA ALDEHYDE RESINS WITH NUMEROUS BRANCHED TERTIARY AMINO GROUPS WHICH PROVIDE VERSATILE POLYMERS HAVING INCREASED STABILITY, SOLUBILITY AND GREATER COMPATIBILITY WITH ANIONIC POLYMERS. THEIR MISCIBILITY CAN BE MODIFIED FOR GREATER SOLUBILITY IN ORGANIC SOLVENTS BY REACTING OTHER AROMATIC NITROGEN CONTAINING COMPOUNDS THEREWITH.
Inventors
- 👤 T Muzyczko
- 👤 D York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:25
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; C08G12/46
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |