Patent US3658712A successfully refreshed from Google Patents.
US3658712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous suspensions containing sodium perborate
Assignee: Henkel AG and Co KGaA
•
Filing: 1971-01-19
•
Granted: 1972-04-25
•
Expires: 1991-01-19
Abstract
Abstract STORAGE STABLE AQUEOUS SUSPENSIONS OF SOLID SODIUM PERBORATE CONSTITUTING THICK LIQUIDS OR PASTES ARE DISCLOSED IN WHICH THE AQUEOUS PHASE HAS A PH OF FROM 3 TO 11 AND CONTAINS IN ADDITION TO THE PERBORATE A NON-OXIDIZABLE VINYL POLYMER CONTAINING CARBOXYL GROUPS. THE POLYMER IS CHARACTERIZED IN THAT A 1% AQUEOUS SOLUTION OF THE POLYMER IN THE FORM OF ITS SODIUM SALT HAS A VISCOSITY OF AT LEAST 5000 CP. AT A PH OF 7 AND A TEMPERATURE OF 20*C. THE SUSPENSIONS CONSTITUTE OXIDIZING AND BLEACHING AGENTS AND ARE CHARACTERIZED BY THEIR OUTSANDING PHYSICAL AND CHEMICAL STABILITY.
Inventors
- 👤 Kurt Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |