US2587071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of calcium hypochlorite
Assignee: Pennsylvania Salt Manufacturing Co
•
Filing: 1945-11-24
•
Granted: 1952-02-26
•
Expires: 1965-11-24
Abstract
No abstract record available.
Inventors
- 👤 Jerome W Sprauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
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 PRECIPITATION OF NEUTRAL CALCIUM HYPRCHLORITE BY SALTING OUT THIS MATERIAL FROM A SOLUTION CONTAINING CALCIUM AND HYPOCHLORITE IONS, THE IMPROVEMENT WHICH COMPRISES SUBSTANTIALLY COMPLETING THE ADDITION OF THE SALT WITHIN A PERIOD OF ABOUT 60 MINUTES, MAINTAINING SAID SOLUTION SUBSTANTIALLY FREE FROM SOLUBLE SULFATE, AND CARRYING OUT THE PRECIPITATION AT A TEMPERATURE BELOW ABOUT 30* C.
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR PRECIPITATION OF NEUTRAL CALCIUM HYPRCHLORITE BY SALTING OUT THIS MATERIAL FROM A SOLUTION CONTAINING CALCIUM AND HYPOCHLORITE IONS, THE IMPROVEMENT WHICH COMPRISES SUBSTANTIALLY COMPLETING THE ADDITION OF THE SALT WITHIN A PERIOD OF ABOUT 60 MINUTES, MAINTAINING SAID SOLUTION SUBSTANTIALLY FREE FROM SOLUBLE SULFATE, AND CARRYING OUT THE PRECIPITATION AT A TEMPERATURE BELOW ABOUT 30* C.
References Cited (Backward Citations)
US1754473A
Cited
US1937230A
Cited
US2007429A
Cited
GB487009A
Cited
US2320635A
Cited
US2368042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |