US2840519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxidation process
Assignee: American Potash and Chemical Corp
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Filing: 1957-05-06
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Granted: 1958-06-24
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 David R Stern
- 👤 Joseph C Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:12
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
IN A PROCESS FOR PRODUCING SODIUM PERCHLORATE, THE STEP OF PASSING A CURRENT THROUGH AN ELECTROLYTE BETWEEN A LEAD DIOXIDE ANODE AND A CATHODE CONSISTING ESSENTIALLY OF NICKEL CHEMICALLY PLATED ON A METAL BASE, THE ELECTROLYTE CONSISTING ESSENTIALLY OF FROM ABOUT 400-700 GRAMS PER LITER OF SODIUM CHLORATE, THE ANODE CURRENT DENSITY BEING SUBSTANTIALLY 1.0 AMPERE PER SQUARE INCH AND THE CATHODE CURRENT DENSITY BEING SUBSTANTIALLY 0.5 AMPERE PER SQUARE INCH.
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |