US3677697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sodium percarbonate
Assignee: GNI I PI OSNOVNOI KHIM
•
Filing: 1970-10-07
•
Granted: 1972-07-18
•
Expires: 1990-10-07
Abstract
Abstract A METHOD OF PRODUCING SODIUM PERCARBONATE BY REACTING SODIUM CARBONATE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF A STABILIZER WHEREIN SODIUM PERCARBONATE STABILIZATION IS EFFECTED BY USING BENZOIC ACID IN COMBINATION WITH A KNOWN STABILIZING AGENT, E.G. A SILICA-CONTAINING INORGANIC COMPOUND.
Inventors
- 👤 Appolinaria Vasilievna Yanush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/10
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |