Patent US3584996A successfully refreshed from Google Patents.
US3584996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of calcium hypochlorite
Assignee: KLIPFONTEIN ORGANIC PROD
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Filing: 1969-03-17
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Granted: 1971-06-15
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Expires: 1989-03-17
Abstract
Abstract CALCIUM HYPOCHLORITE IS PRODUCED WITH RELATIVELY LOW CALCIUM CHLORIDE CONTENT, BY CHLORINATING AN AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE, REMOVING LIQUID FROM THE SUSPENSION ON A FILTER OR CENTRIFUGE TO PRODUCE A CAKE, AND CONTACTING THE CAKE WITH AN AQUEOUS SODIUM HYPOCHLORITE SOLUTION WHILE MAINTAINING THE CAKE ON THE FILTER OR CENTRIFUGE. NOT ONLY IS THE CALCIUM CHLORIDE CONTENT GREATLY REDUCED, BUT ALSO THE AMOUNT OF SODIUM HYPOCHLORITE CAN BE REDUCED SUBSTANTIALLY BELOW STOICHIOMETRIC, E.G. 40 TO 70% OF STOICHIOMETRIC.
Inventors
- 👤 Gilbert O Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/04; C01B11/06; C01B11/064
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |