Patent US3669302A successfully refreshed from Google Patents.
US3669302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded cover and vent for electrolytic capacitors
Assignee: Sprague Electric Co
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Filing: 1970-08-24
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Granted: 1972-06-13
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Expires: 1990-08-24
Abstract
Abstract A molded cover of high melting organic polymer is molded around a low melting vent of organic polymer. The combination is suitable for sealing electrolytic devices.
Inventors
- 👤 Mark Markarian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12; Y; Y10; Y10S; Y10S220/00; Y10S220/27
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
The cover and vent combination of claim 1 wherein said cover is a higher melting thermoplastic polymer molded around the edge surfaces of said vent in a manner that the edge surface of said vent is thermally fused to the contacting surfaces of said cover.
Claim 2
Dependent Claim
24 words
The cover and vent combination of claim 2 wherein said vent is low melting polyethylene and said cover is high melting high density polyethylene.
Claim 3
Dependent Claim
22 words
The cover and vent combination of claim 2 wherein said vent is low melting polyethylene and said cover is high melting polypropylene.
Claim 4
Dependent Claim
25 words
The cover and vent combination of claim 2 wherein said vent is a low melting high density polyethylene and said cover is high melting polypropylene.
Claim 5
Dependent Claim
22 words
The cover and vent combination of claim 2 wherein said vent is low melting polystyrene and said cover is high melting styrene-acrylonitrile.
Claim 6
Dependent Claim
24 words
The vent and cover combination of claim 2 wherein said vent is low melting polystyrene and said cover is high melting acrylonitrile butadiene styrene.
Claim 7
Dependent Claim
31 words
The vent and cover combination of claim 2 wherein said vent is a low melting polymer of caprolactam and said cover is a high melting polymer of hexamethylene and adipic acid.
Claim 8
Dependent Claim
32 words
The vent and cover combination of claim 1 wherein said cover is a higher melting thermoset polymer, said cover is so constructed and arranged as not to distort said prEform thermoplastic vent.
Claim 9
Dependent Claim
29 words
The vent and cover combination of claim 9 wherein said cover is a low temperature, low pressure curing thermoset polymer selected from the group consisting of epoxies and phenolics.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |