US3138746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitors and electrolyte therefor
Assignee: Individual
•
Filing: 1961-05-01
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Granted: 1964-06-23
•
Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Francis J P J Burger
- 👤 Cheseldine David Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:25
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0032; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN ELECTROLYTE FOR USE IN AN ELECTROLYTIC CAPACITOR, SAID ELECTROLYTE CONSISTING ESSENTIALLY OF A SOLUTION IN AN INERT POLAR SOLVENT CONTAINING FROM ABOUT 0.01 TO ABOUT 5 MOLES OF FORMATE ANIONS, FROM ABOUT 0.01 TO ABOUT 5 MOLES OF A MEMBER OF THE GROUP CONSISTING OF PRIMARY, SECONDARY AND TERTIARY ALKYL AMINES, AROMATIC AMINES, MORPHOLINE, PYRIDINE AND PIPERIDINE, AND OXIDE FILM-FORMING ANIONS SELECTED FROM AT LEAST ONE OF THE GROUPS CONSISTING OF BORATE, PHOSPHATE AND PHOSPHITE, THE BORATE ANIONS BEING PRESENT AT A CONCENTRATION OF FROM 0 TO ABOUT 15% BY WEIGHT OF THE SOLUTION, THE PHOSPHATE AND PHOSPHITE ANIONS EACH BEING PRESENT AT A CONCENTRATION OF FROM 0 TO ABOUT 5% AND THE TOTAL CONCENTRATION OF SAID FILM-FORMING ANIONS BEING AT LEAST ABOUT 0.1%.
Claim 2
Dependent Claim
125 words
AN ELECTROLYTE FOR USE IN AN ELECTROLYTIC CAPACITOR, SAID ELECTROLYTE CONSISTING ESSENTIALLY OF A SOLUTION IN AN INERT POLAR SOLVENT CONTAINING FROM ABOUT 0.01 TO ABOUT 5 MOLES OF FORMATE ANIONS, FROM ABOUT 0.01 TO ABOUT 5 MOLES OF A MEMBER OF THE GROUP CONSISTING OF PRIMARY, SECONDARY AND TERTIARY ALKYL AMINES, AROMATIC AMINES, MORPHOLINE, PYRIDINE AND PIPERIDINE, AND OXIDE FILM-FORMING ANIONS SELECTED FROM AT LEAST ONE OF THE GROUPS CONSISTING OF BORATE, PHOSPHATE AND PHOSPHITE, THE BORATE ANIONS BEING PRESENT AT A CONCENTRATION OF FROM 0 TO ABOUT 15% BY WEIGHT OF THE SOLUTION, THE PHOSPHATE AND PHOSPHITE ANIONS EACH BEING PRESENT AT A CONCENTRATION OF FROM 0 TO ABOUT 5% AND THE TOTAL CONCENTRATION OF SAID FILM-FORMING ANIONS BEING AT LEAST ABOUT 0.1%.
References Cited (Backward Citations)
US2108995A
Cited
US2749487A
Cited
GB816712A
Cited
US2839472A
Cited
US2882233A
Cited
US2944026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |