Patent US3134641A successfully refreshed from Google Patents.
US3134641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of calcium hypochlorite
Assignee: PPG Industries Inc
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Filing: 1961-08-09
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Granted: 1964-05-26
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert D Gleichert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:28
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/04; C01B11/06; C01B11/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PROCESS FOR THE MANUFACTURE OF CALCIUM HYPOCHLORITE WHEREIN CALCIUM HYDROXIDE WITH HYPOCHLOROUS ACID ARE ADDED TO AN AQUEOUS MEDIUM CONTAINING CALCIUM HYPOCHLORITE AND CALCIUM CHLORIDE, THE IMPROVEMENT WHICH COMPRISES ADDING 0.5 TO 1.5 EQUIVALENTS OF ALKALI METAL HYPOCHLORITE PER EQUIVALENT OF C ALCIUM CHLORIDE IN THE MEDIUM WHILE MAINTAINING THE PH OF THE MEDIUM AT 10.0 TO 10.5.
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR THE MANUFACTURE OF CALCIUM HYPOCHLORITE WHEREIN CALCIUM HYDROXIDE WITH HYPOCHLOROUS ACID ARE ADDED TO AN AQUEOUS MEDIUM CONTAINING CALCIUM HYPOCHLORITE AND CALCIUM CHLORIDE, THE IMPROVEMENT WHICH COMPRISES ADDING 0.5 TO 1.5 EQUIVALENTS OF ALKALI METAL HYPOCHLORITE PER EQUIVALENT OF C ALCIUM CHLORIDE IN THE MEDIUM WHILE MAINTAINING THE PH OF THE MEDIUM AT 10.0 TO 10.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |