US3120695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitors
Assignee: Individual
•
Filing: 1957-11-18
•
Granted: 1964-02-11
•
Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Burnham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0032; H01G9/004; H01G9/022; H01G9/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR MANUFACTURING A TANTALUM ELECTROLYTIC CAPACITOR, WHICH COMPRISES: FORMING AN ADHERENT TANTALUM OXIDE LAYER UPON A TANTALUM ANODE AT A VOLTAGE OF FROM ABOUT 100 TO ABOUT 400 VOLTS IN A WEAKLY ACIDIC ELECTROLYTE; POLARIZING SAID TANTALUM ANODE IN AN AQUEOUS MINERAL ACID ELECTROLYTE AT A VOLTAGE OF FROM ABOUT 75 VOLTS TO LESS THAN THE VOLTAGE AT WHICH SCINTILLATION OCCURS UNTIL A CONSTANT LEAKAGE CURRENT IS ACHIEVED; CLEANING AND DRYING SAID ANODE; AND ASSEMBLING SID ANODE IN ELECTROLYTIC CAPACITOR UTILIZING A CATHODE AND AN ELECTROLYTE ELECTRICALLY CONNECTING SID ANODE AND SAID CATHODE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR MANUFACTURING A TANTALUM ELECTROLYTIC CAPACITOR, WHICH COMPRISES: FORMING AN ADHERENT TANTALUM OXIDE LAYER UPON A TANTALUM ANODE AT A VOLTAGE OF FROM ABOUT 100 TO ABOUT 400 VOLTS IN A WEAKLY ACIDIC ELECTROLYTE; POLARIZING SAID TANTALUM ANODE IN AN AQUEOUS MINERAL ACID ELECTROLYTE AT A VOLTAGE OF FROM ABOUT 75 VOLTS TO LESS THAN THE VOLTAGE AT WHICH SCINTILLATION OCCURS UNTIL A CONSTANT LEAKAGE CURRENT IS ACHIEVED; CLEANING AND DRYING SAID ANODE; AND ASSEMBLING SID ANODE IN ELECTROLYTIC CAPACITOR UTILIZING A CATHODE AND AN ELECTROLYTE ELECTRICALLY CONNECTING SID ANODE AND SAID CATHODE.
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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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |