Patent US5296340A successfully refreshed from Google Patents.
Patent US2772229A successfully refreshed from Google Patents.
US2772229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of perchlorates
Assignee: Pennsylvania Salt Manufacturing Co
•
Filing: 1953-07-13
•
Granted: 1956-11-27
•
Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Karr Errol Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:39
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR THE PRODUCTIONOF A PERCHLORATE BY THE ELECTROLYSIS OF AN AQUEOUS ACID SOLUTION OF THE CORRESPONDING CHLORATE IN A NON-DIAPHRAGM ELECTROLYTIC CELL INWHICH WITHOUT ACID ADDITION THE ELECTROLYTE, THE IMPROVEMENT LINE DURING THE COURSE OF ELECTROLYSIS, THE IMPROVEMENT COMPRISING THE ADDITION OF PERCHLORIC ACID TO MAINTAIN THE ELECTROLYTE AT A PH BELOW 7.
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR THE PRODUCTIONOF A PERCHLORATE BY THE ELECTROLYSIS OF AN AQUEOUS ACID SOLUTION OF THE CORRESPONDING CHLORATE IN A NON-DIAPHRAGM ELECTROLYTIC CELL INWHICH WITHOUT ACID ADDITION THE ELECTROLYTE, THE IMPROVEMENT LINE DURING THE COURSE OF ELECTROLYSIS, THE IMPROVEMENT COMPRISING THE ADDITION OF PERCHLORIC ACID TO MAINTAIN THE ELECTROLYTE AT A PH BELOW 7.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |