US3769089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary electrochemical cell
Assignee: US Philips Corp
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Filing: 1971-07-08
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Granted: 1973-10-30
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Expires: 1991-07-08
Abstract
Abstract A primary electrochemical cell consisting of a cathode half-cell in which a halogenate is used as a depolarizer, and an anode half-cell in which phosphorus is used as a reactant and also a mediator which enhances the conversion of phosphorus into phosphoric acid.
Inventors
- 👤 J Oomen
- 👤 F Romeijn
- 👤 G Schwandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M50/00; H01M50/30; H01M50/394; H01M6/00; H01M6/24; H01M50/40; H01M50/463; H01M50/469
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
26 words
A primary electrochemical cell as claimed in claim 1, in which iodine is used as a mediator for enhancing the conversion of phosphorus into phosphoric acid.
Claim 2
Dependent Claim
31 words
A primary electrochemical cell as claimed in claim 1 in which a halogenate of the group consisting of potassium chlorate, potassium bromate, sodium iodate, calcium iodate and magnesium iodate is used.
Claim 3
Dependent Claim
21 words
A primary electrochemical cell as claimed in claim 3, in which a salt decreasing the solubility of the halogenate is used.
Claim 4
Dependent Claim
34 words
A primary electrochemical cell as claimed in claim 4, in which a sodium halogenate is used as a halogenate and primary potassium phosphate is used as a salt decreasing the solubility of the halogenate.
Claim 5
Dependent Claim
35 words
A primary electrochemical cell as claimed in claim 4 in which an aqueous solution of an acid selected from the group consisting of phosphoric acid, sulfuric acid and perchloric acid is used as an electrolyte.
Claim 6
Dependent Claim
27 words
A primary cell as claimed in claim 3, in which electrodes consisting of carbon felt sElected from the group consisting of graphite and carbon black are used.
Claim 7
Dependent Claim
19 words
A primary electrochemical cell as claimed in claim 3, in which a cation-selective diaphragm is used as a separator.
Claim 8
Dependent Claim
25 words
A primary electrochemical cell as claimed in claim 8, in which a diaphragm consisting of a polysulphonic acid polyolefine is used as a cation-selective diaphragm.
Claim 9
Dependent Claim
35 words
A primary electrochemical cell as claimed in claim 3, in which a separator is used in the pores of which a material is provided which is substantially insoluble in the electrolyte used in the cell.
Claim 10
Dependent Claim
32 words
A primary electrochemical cell as claimed in claim 10, in which the material provided in the pores of the separator and being substantially insoluble in the electrolyte used consists of Zr (HPO4)2.H2O,
Claim 11
Dependent Claim
38 words
A primary electrochemical cell as claimed in claim 3, in which a zirconyl salt is added to the electrolyte used in the cathode half-cell and in which phosphoric acid is used as an electrolyte in the anode half-cell.
Claim 12
Dependent Claim
54 words
A primary cell as claimed in claim 3, in which bromate is used as a halogenate and in which the pH of the electrolyte lies between - 0.3 and 2, the concentration of sodium and/or potassium ions being 1-4 g ion/l and the specific resistance of the electolyte being less than 10 ohms. cm.
Claim 13
Dependent Claim
53 words
A primary cell as claimed in claim 3 in which chlorate is used as a halogenate and in which the pH of the electrolyte lies between -0.5 and 1, the concentration of sodium and/or potassium ions being 1-4 g ion/l and the specific resistance of the electrolyte being less than 5 ohm. cm.
References Cited (Backward Citations)
GB231013A
Cited
US3260620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |