US3261902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making encapsulated capacitor
Assignee: Duracell Inc USA
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Filing: 1964-09-08
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Granted: 1966-07-19
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Godfrey R Pearce
- 👤 Lawrence R Sparrow
- 👤 Braiman Jerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:00
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/12; H01G9/00; H01G9/004; H01G9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD OF ENCAPSULATING AN ELECTROLYTIC ALUMINUM CAPACITOR COMPRISING THE STEPS OF PRE-FORMING AN OPENEND THERMOPLASTIC SLEEVE SUBSTANTIALLY EQUIVALENT IN SHAPE TO THE CONTOUR OF A CAPACITOR BODY TO BE ENCASED, SAID CAPACITOR BODY BEING IMPREGNATED WITH A SUITABLE LIQUID NON-POLYMERIZABLE ELECTROLYTE, PLACING SAID CAPACITOR BODY INSIDE SAID PRE-FORMED SLEEVE SO THAT ONLY THE TERMINAL WIRES OF SAID CAPACITOR BODY PROJECT THEREFROM, POSITIONING SAID PRE-FORMED SLEEVE AND SAID CAPACITOR BODY WITHIN A SUITABLE MOLD CAVITY HAVING PROTUBERANCES AT POINTS OF LEAD EGRESS INTRODUCING INTO SAID MOLD CAVITY A MOLTEN THERMOPLASTIC MATERIAL HAVING FUSION CHARACTERISTIC EQUIVALENT TO THOSE OF SAID PRE-FORMED SLEEVE, INTRODUCING SAID MOLTEN MATERIAL IN SUCH A PHYSICAL STATE WHEREBY COMPLETE COALESCENCE WITH SAID PRE-FORMED CASNG IS ACHIEVED, AND FLOWING SAID MOLTEN MATERIAL INTO SAID PROTUBERANCES AND AROUND THE LEADS TO SEAL THE SAME TIGHTLY THEREIN, THEREBY PRODUCING A UNITARY CAPACITOR CAPSULE ADHERING TO SAID TERMINAL WIRES TO FORM A TIGHT SEAL THEREWITH.
Claim 2
Independent Claim
154 words
A METHOD OF ENCAPSULATING AN ELECTROLYTIC ALUMINUM CAPACITOR COMPRISING THE STEPS OF PRE-FORMING AN OPENEND THERMOPLASTIC SLEEVE SUBSTANTIALLY EQUIVALENT IN SHAPE TO THE CONTOUR OF A CAPACITOR BODY TO BE ENCASED, SAID CAPACITOR BODY BEING IMPREGNATED WITH A SUITABLE LIQUID NON-POLYMERIZABLE ELECTROLYTE, PLACING SAID CAPACITOR BODY INSIDE SAID PRE-FORMED SLEEVE SO THAT ONLY THE TERMINAL WIRES OF SAID CAPACITOR BODY PROJECT THEREFROM, POSITIONING SAID PRE-FORMED SLEEVE AND SAID CAPACITOR BODY WITHIN A SUITABLE MOLD CAVITY HAVING PROTUBERANCES AT POINTS OF LEAD EGRESS INTRODUCING INTO SAID MOLD CAVITY A MOLTEN THERMOPLASTIC MATERIAL HAVING FUSION CHARACTERISTIC EQUIVALENT TO THOSE OF SAID PRE-FORMED SLEEVE, INTRODUCING SAID MOLTEN MATERIAL IN SUCH A PHYSICAL STATE WHEREBY COMPLETE COALESCENCE WITH SAID PRE-FORMED CASNG IS ACHIEVED, AND FLOWING SAID MOLTEN MATERIAL INTO SAID PROTUBERANCES AND AROUND THE LEADS TO SEAL THE SAME TIGHTLY THEREIN, THEREBY PRODUCING A UNITARY CAPACITOR CAPSULE ADHERING TO SAID TERMINAL WIRES TO FORM A TIGHT SEAL THEREWITH.
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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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |