Patent US3681022A successfully refreshed from Google Patents.
US3681022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of stable hydrogen peroxide solutions
Assignee: FMC Corp
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Filing: 1970-05-01
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Granted: 1972-08-01
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Expires: 1990-05-01
Abstract
Abstract VERY STABLE HYDROGEN PEROXIDE SOLUTION ARE MADE BY ADDING AN ALKALINE SODIUM STANNATE SOLUTION, ADJUSTED TO PH 10.5 TO 11.0, WITH NITRILO TRIMETHYLENE PHOSPHONIC ACID, EITHER ADDING IT TO CONCENTRATED HYDROGEN PEROXIDE OR FEEDING THE TWO MATERIALS SIMULTANEOUSLY INTO A MIXER, AND THEN ADJUSTING THE PH OF THE HYDROGEN PEROXIDE TO 2.75 TO 3.25 FOR 35% PEROXIDE SOLUTIONS, AND TO CORRESPONDING LOWER OR HIGHER PH FOR MORE OR LESS CONCENTRATED SOLUTIONS, WITH ADDITIONAL NITRILO TRIMETHYLENE PHOSPHONIC ACID. INORGANIC PHOSPHATE MAY BE PRESENT IF DESIRED.
Inventors
- 👤 William H Kibbel Jr
- 👤 Eugene T O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:36
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |