Patent US3900775A successfully refreshed from Google Patents.
US3900775A
Expired / Lapsed
US
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Metallized film capacitor
Assignee: Panasonic Holdings Corp
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Filing: 1974-06-24
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Granted: 1975-08-19
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Expires: 1994-06-24
Abstract
Abstract A metallized film capacitor wherein a polyethylene terephthalate film both sides of which are metallized, and a polypropylene film having a thickness of 70 to 90% of that of said polyethylene terephthalate film are wound at the same time.
Inventors
- 👤 Kazushige Takashima
- 👤 Katumi Nishigaki
- 👤 Terumasa Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:06
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/06; H01G4/14; H01G4/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
46 words
A METALLIZED FILM CAPACITOR COMPRISING A POLYETHYLENE TEREPHTHALATE FILM BOTH SIDES OF WHICH ARE METALLIZED, AND A NON-METALLIZED POLYPROPYLENE FILM, BOTH SAID FILM BEING WOUND AT THE SAME TIME, THE THICKNESS OF SAID POLYPROLPYLENE FILM BEING 70 TO 90% OF THAT OF SAID POLYETHLENE TEREPHALATE FILM.
Claim 2
Dependent Claim
46 words
A METALLIZED FILM CAPACITOR COMPRISING A POLYETHYLENE TEREPHTHALATE FILM BOTH SIDES OF WHICH ARE METALLIZED, AND A NON-METALLIZED POLYPROPYLENE FILM, BOTH SAID FILM BEING WOUND AT THE SAME TIME, THE THICKNESS OF SAID POLYPROLPYLENE FILM BEING 70 TO 90% OF THAT OF SAID POLYETHLENE TEREPHALATE FILM.
Claim 3
Dependent Claim
29 words
A metallized film capacitor as claimed in claim 1, wherein the width of said polypropylene film is at least 1 mm less than that of said polyethylene terephthalate film.
References Cited (Backward Citations)
US3553543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |