Patent US3743440A successfully refreshed from Google Patents.
Patent US3056072A successfully refreshed from Google Patents.
US3056072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tantalum capacitor
Assignee: Sprague Electric Co
•
Filing: 1958-06-26
•
Granted: 1962-09-25
•
Expires: 1978-06-26
Abstract
No abstract record available.
Inventors
- 👤 Walter W Schroeder
- 👤 David B Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:39
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN ELECTROLYTIC CAPACITOR COMPRISING A SILVER CATHODE CONTAINER HAVING AN INTEGRAL CLOSED END, AN INERT SPACER MEMBER WITHIN SAID CONTAINER AT SAID CLOSED END, A PELLET-TYPE TANTALUM ANODE POSITIONED ON SAID SPACER MEMBER, A CORROSIVE ELECTROLYTE HAVING AN ACID PH SURROUNDING SAID ANODE IN SAID CONTAINER, A SEAL COMPRISING A CIRCUMFERENTIALLY GROOVED PLUG OF ESSENTIALLY RIGID HALOGENATED ETHYLENE POLYMER WITHIN SAID CONTAINER EXTERNAL OF SAID ANODE, A TACKY HYDROCARBON CAULKING MATERIAL IN SAID GROOVE, SAID ANODE MAINTAINED BETWEEN SAID PLUG AND SAID SPACER BY THE LIP OF SAID CONTAINER BEING SPUN ONTO SAID SEAL, SAID CAPACITOR SEALED BY THE ADJACENT WALL OF SAID CONTAINER BEING ROLLED INTO SAID GROOVE WHEREBY SAID CAULKING MATERIAL MAINTAINS THE SEAL UPON DIFFERENTIAL EXPANSION AND CONTRACTION OF SAID CONTAINER AND SAID PLUG.
Claim 2
Dependent Claim
127 words
AN ELECTROLYTIC CAPACITOR COMPRISING A SILVER CATHODE CONTAINER HAVING AN INTEGRAL CLOSED END, AN INERT SPACER MEMBER WITHIN SAID CONTAINER AT SAID CLOSED END, A PELLET-TYPE TANTALUM ANODE POSITIONED ON SAID SPACER MEMBER, A CORROSIVE ELECTROLYTE HAVING AN ACID PH SURROUNDING SAID ANODE IN SAID CONTAINER, A SEAL COMPRISING A CIRCUMFERENTIALLY GROOVED PLUG OF ESSENTIALLY RIGID HALOGENATED ETHYLENE POLYMER WITHIN SAID CONTAINER EXTERNAL OF SAID ANODE, A TACKY HYDROCARBON CAULKING MATERIAL IN SAID GROOVE, SAID ANODE MAINTAINED BETWEEN SAID PLUG AND SAID SPACER BY THE LIP OF SAID CONTAINER BEING SPUN ONTO SAID SEAL, SAID CAPACITOR SEALED BY THE ADJACENT WALL OF SAID CONTAINER BEING ROLLED INTO SAID GROOVE WHEREBY SAID CAULKING MATERIAL MAINTAINS THE SEAL UPON DIFFERENTIAL EXPANSION AND CONTRACTION OF SAID CONTAINER AND SAID PLUG.
References Cited (Backward Citations)
US1352650A
Cited
GB481114A
Cited
US2199446A
Cited
US2535945A
Cited
US2744217A
Cited
US2758258A
Cited
GB772555A
Cited
US2851642A
Cited
US2871426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |