Patent US2567653A successfully refreshed from Google Patents.
Patent US3801706A successfully refreshed from Google Patents.
US3801706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sodium percarbonate
Assignee: Henley Group Inc
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Filing: 1971-04-21
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Granted: 1974-04-02
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Expires: 1991-04-21
Abstract
Abstract A PROCESS FOR THE MANUFACTURE OF SODIUM PERCABONATE COMPRISING THE STEPS OF MIXING AN AQUEOUS SOLUTION OF SODIUM CARBONATE WITH APPROXIMATELY THE STOICHIOMETRIC QUANTITY OF AN AQUEOUS SOLUTION OF HYDROEN PEROXIDE, SAID SOLUTIONS BEING OF A SUFFICIENTLY HIGH CONCENTRATION TO INSURE THE PRECIPITATION OF AT LEAST PART OF THE THEREBY PRODUCED SODIUM PERCARBONATE; VIGOROUSLY AGITATING, THE AQUEOUS SODIUM PERCARBONATE SLURRY SO PRODUCED, AND FEEDING SAID SLURRY TO A SPRAY DRYER IN AN ESSENTIALLY HOMOGENOUS STATE, THEREBY PRODUCING A DRY, FREE-FLOWING SODIUM PERCARBONATE PRODUCTo
Inventors
- 👤 M Sack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:53
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/10; C01B15/103
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |