US4977309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic PTC thermistor
Assignee: Murata Manufacturing Co Ltd
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Filing: 1989-04-06
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Granted: 1990-12-11
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Expires: 2009-04-06
Abstract
Abstract An organic positive temperature coefficient (PTC) thermistor includes an organic PTC thermistor sheet on one main surface of which a pair of electrodes are formed. A conductive sheet is adhered on each of the electrodes at terminal fixing portion by, for example, conductive adhesives. Both main surfaces of the organic PTC thermistor sheet together with the conductive sheets and the electrodes are covered by insulation film. A terminal is inserted so as to penetrate the insulation film, each of the conductive sheets, each of the electrodes, the organic PTC thermistor sheet and the insulation film, and then crimped.
Inventors
- 👤 Katsuyuki Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:05
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/146; H01; H01C; H01C1/00; H01C1/02; H01C1/028; H01C1/14; H01C1/1406; H01C7/00; H01C7/02; H01C7/028
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
An organic PTC thermistor: an organic PTC thermistor sheet; a pair of electrodes formed on one main surface of said organic PTC thermistor sheet; a pair of conductive sheets respectively formed on said pair of electrodes at respective terminal fixing locations; an insulation cover covering at least said conductive sheets and said electrodes; and a pair of crimped terminals each penetrating said insulation cover, one of said conductive sheets, the corresponding one of said electrodes, and said organic PTC thermistor sheet.
Claim 2
Dependent Claim
81 words
An organic PTC thermistor: an organic PTC thermistor sheet; a pair of electrodes formed on one main surface of said organic PTC thermistor sheet; a pair of conductive sheets respectively formed on said pair of electrodes at respective terminal fixing locations; an insulation cover covering at least said conductive sheets and said electrodes; and a pair of crimped terminals each penetrating said insulation cover, one of said conductive sheets, the corresponding one of said electrodes, and said organic PTC thermistor sheet.
Claim 3
Dependent Claim
21 words
An organic PTC thermistor in accordance with claim 1, wherein said conductive sheets are made of metal foil having good conductivity.
Claim 4
Dependent Claim
26 words
An organic PTC thermistor in accordance with claim 1, wherein said electrodes are made of an inelastic conductive material applied to said organic PTC thermistor sheet.
Claim 5
Dependent Claim
24 words
An organic PTC thermistor in accordance with claim 3, wherein said electrodes are formed of silver paste printed on said organic PTC thermistor sheet.
Claim 6
Dependent Claim
22 words
An organic PTC thermistor in accordance with claim 2, wherein said conductive sheets are adhered to said electrodes by a conductive adhesive.
Claim 7
Dependent Claim
22 words
An organic PTC thermistor in accordance with claim 1, wherein said conductive sheets are adhered to said electrodes by a conductive adhesive.
Claim 8
Dependent Claim
18 words
An organic PTC thermistor in accordance with claim 2, wherein said conductive sheets are made of copper foil.
Claim 9
Dependent Claim
24 words
An organic PTC thermistor in accordance with claim 7, wherein said electrodes are formed of silver paste printed on said organic PTC thermistor sheet.
Claim 10
Dependent Claim
22 words
An organic PTC thermistor in accordance with claim 8, wherein said conductive sheets are adhered to said electrodes by a conductive adhesive.
References Cited (Backward Citations)
US4652727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |