Patent US3443570A successfully refreshed from Google Patents.
Patent US3237060A successfully refreshed from Google Patents.
US3237060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitors
Assignee: Sprague Electric Co
•
Filing: 1961-08-29
•
Granted: 1966-02-22
•
Expires: 1981-08-29
Abstract
No abstract record available.
Inventors
- 👤 Sidney D Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:40
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/224; H01G9/00; H01G9/004; H01G9/08; H01G9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN ELECTROLYTIC CAPACITOR COMPRISING A CONTAINER, A STRONG ACID ELECTROLYTE IN SAID CONTAINER AND AN END-SEAL HAVING THREE STACKED CLOSURE MEMBERS SEALING THE END OF SAID CONTAINER, THE FIRST OF SAID MEMBERS BEING A PRIMARY SEAL NEAREST SAID ELECTROLYTE AND COMPRISING AN INERT INELASTIC HIGH MOLECULAR WEIGHT POLYMER, THE SECOND OF SAID MEMBERS BEING A SECONDARY SEAL ABUTTING SAID PRIMARY SEAL AND COMPRISING AN ALKALINE HIGH MOLECULAR WEIGHT POLYMER CONTAINING AN AMINE GROUP REACTIVE WITH SAID ELECTROLYTE, AND THE THIRD OF SAID MEMBERS BEING A TERTIARY SEAL COMPRISING A RELATIVELY INERT HIGH MOLECULAR WEIGHT ELASTOMER IN ABUTTING AND PRESSURE EXERTING ENGAGEMENT WITH SAID SECONDARY SEAL.
Claim 2
Dependent Claim
105 words
AN ELECTROLYTIC CAPACITOR COMPRISING A CONTAINER, A STRONG ACID ELECTROLYTE IN SAID CONTAINER AND AN END-SEAL HAVING THREE STACKED CLOSURE MEMBERS SEALING THE END OF SAID CONTAINER, THE FIRST OF SAID MEMBERS BEING A PRIMARY SEAL NEAREST SAID ELECTROLYTE AND COMPRISING AN INERT INELASTIC HIGH MOLECULAR WEIGHT POLYMER, THE SECOND OF SAID MEMBERS BEING A SECONDARY SEAL ABUTTING SAID PRIMARY SEAL AND COMPRISING AN ALKALINE HIGH MOLECULAR WEIGHT POLYMER CONTAINING AN AMINE GROUP REACTIVE WITH SAID ELECTROLYTE, AND THE THIRD OF SAID MEMBERS BEING A TERTIARY SEAL COMPRISING A RELATIVELY INERT HIGH MOLECULAR WEIGHT ELASTOMER IN ABUTTING AND PRESSURE EXERTING ENGAGEMENT WITH SAID SECONDARY SEAL.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |