Patent US4739222A successfully refreshed from Google Patents.
US4739222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact fluorescent lamp with a screw base
Assignee: Hitachi Ltd
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Filing: 1986-05-05
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Granted: 1988-04-19
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Expires: 2006-05-05
Abstract
Abstract A compact fluorescent lamp with a screw base having a lamp with an inner tube, an outer case which is provided at one end of the lamp and includes an operating circuit section therein and has a screw base at one end of the outer case, and a molding compound having excellent insulation and good conduction of heat which is pressed and interposed into the gap between the operating circuit section and the outer case in order to transfer the heat generated in the operating circuit section to the outer case.
Inventors
- 👤 Ikuya Nomoto
- 👤 Ichiro Torii
- 👤 Kenji Kawabata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:15
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A compact fluorescent lamp with a screw base comprising: a lamp having an inner tube; an outer case which is provided at one end of said lamp and includes an operating circuit section therein and has a screw base at one end of said outer case; a pre-shaped molding compound element having excellent insulation and good conduction of heat which is pressed and interposed into a gap between said operating circuit section and said outer case in order to transfer the heat generated in said operating circuit section, when active to said outer case.
Claim 2
Dependent Claim
94 words
A compact fluorescent lamp with a screw base comprising: a lamp having an inner tube; an outer case which is provided at one end of said lamp and includes an operating circuit section therein and has a screw base at one end of said outer case; a pre-shaped molding compound element having excellent insulation and good conduction of heat which is pressed and interposed into a gap between said operating circuit section and said outer case in order to transfer the heat generated in said operating circuit section, when active to said outer case.
Claim 3
Dependent Claim
39 words
A compact fluorescent lamp according to claim 1, wherein said operating circuit section includes a high frequency oscillator transformer, and said pre-shaped molding compound element is pressed and interposed into the gap between said transformer and said outer case.
Claim 4
Dependent Claim
18 words
A compact fluorescent lamp according to claim 2, wherein said pre-shaped molding compound element includes silicon rubber compound.
Claim 5
Dependent Claim
19 words
A compact fluorescent lamp according to claim 2, wherein said pre-shaped molding compound element includes silicon rubber gel compound.
Claim 6
Dependent Claim
56 words
A compact fluorescent lamp according to claim 1, wherein said operating circuit section includes a high frequency oscillator transformer and a switching element, and said pre-shaped molding compound element is pressed and interposed into the gap between said transformer and said outer case and into the gap between said switching element and said outer case, respectively.
Claim 7
Dependent Claim
18 words
A compact fluorescent lamp according to claim 5, wherein said pre-shaped molding compound element includes silicon rubber compound.
Claim 8
Dependent Claim
19 words
A compact fluorescent lamp according to claim 5, wherein said pre-shaped molding compound element includes silicon rubber gel compound.
Claim 9
Dependent Claim
18 words
A compact fluorescent lamp according to claim 1, wherein said pre-shaped molding compound element includes silicon rubber compound.
Claim 10
Dependent Claim
19 words
A compact fluorescent lamp according to claim 1, wherein said pre-shaped molding compound element includes silicon rubber gel compound.
Claim 11
Dependent Claim
110 words
A compact fluorescent lamp having a screw-type of threaded base comprising: a lamp including an inner tube; an outer case which is provided at one end of said lamp includes an operating circuit means therein and has a screw-type of threaded base shape at an end of said outer case, other than the lamp connecting end; and a silicon rubber gel type compound element that is pre-shaped, having excellent insulation and good conduction of heat characteristics, is pressed and interposed into a gap between said operating circuit means and said outer case in order to transfer the heat generated in said operating circuit means, when active, to said outer case.
Claim 12
Dependent Claim
110 words
A compact fluorescent lamp having a screw-type of threaded base comprising: a lamp including an inner tube; an outer case which is provided at one end of said lamp includes an operating circuit means therein and has a screw-type of threaded base shape at an end of said outer case, other than the lamp connecting end; and a silicon rubber gel type compound element that is pre-shaped, having excellent insulation and good conduction of heat characteristics, is pressed and interposed into a gap between said operating circuit means and said outer case in order to transfer the heat generated in said operating circuit means, when active, to said outer case.
Claim 13
Dependent Claim
104 words
In a compact fluorescent lamp including a lamp having an inner tube and an outer case which is provided at one end of said lamp and which has an operating circuit means therein and a screw-type of threaded base shape at an end thereof, other than the lamp connecting end, wherein the improvement comprises: a molding compound element that is pre-shaped, having excellent insulation and good conduction of heat characteristics, is pressed and interposed into a gap between said operating circuit means and said outer case in order to transfer the heat generated in said operating circuit means, when active, to said outer case.
Claim 14
Dependent Claim
104 words
In a compact fluorescent lamp including a lamp having an inner tube and an outer case which is provided at one end of said lamp and which has an operating circuit means therein and a screw-type of threaded base shape at an end thereof, other than the lamp connecting end, wherein the improvement comprises: a molding compound element that is pre-shaped, having excellent insulation and good conduction of heat characteristics, is pressed and interposed into a gap between said operating circuit means and said outer case in order to transfer the heat generated in said operating circuit means, when active, to said outer case.
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |