US2823177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for lowering the chlorate content of alkali metal hydroxides
Assignee: Occidental Chemical Corp
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Filing: 1954-01-13
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Granted: 1958-02-11
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Expires: 1974-01-13
Abstract
No abstract record available.
Inventors
- 👤 Sidney G Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:08
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE METHOD OF DECOMPOSING ALKALI METAL CHLORIDES IN ELECTROLYTIC ALKALI CHLORINE CELLS OF THE DIAPHRAGM TYPE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID ELECTROLYSIS IN THE PRESENCE OF A FINELY DIVIDED CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, THEIR HYDROXIDES AND MIXTURES THEREOF DISPERSED IN SAID DIAPHGRAM WHEREIN SAID FINELY DIVIDED MATERIAL DISPERSED IN THE DIAPHRAGM IS BETWEEN ABOUT 0.25 PERCENT AND ABOUT 10 PERCENT BY WEIGHT OF THE DIAPHRAGM.
Claim 2
Dependent Claim
73 words
IN THE METHOD OF DECOMPOSING ALKALI METAL CHLORIDES IN ELECTROLYTIC ALKALI CHLORINE CELLS OF THE DIAPHRAGM TYPE, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID ELECTROLYSIS IN THE PRESENCE OF A FINELY DIVIDED CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, THEIR HYDROXIDES AND MIXTURES THEREOF DISPERSED IN SAID DIAPHGRAM WHEREIN SAID FINELY DIVIDED MATERIAL DISPERSED IN THE DIAPHRAGM IS BETWEEN ABOUT 0.25 PERCENT AND ABOUT 10 PERCENT BY WEIGHT OF THE DIAPHRAGM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |