Patent US3673401A successfully refreshed from Google Patents.
US3673401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp protection apparatus
Assignee: THERMOPLASTIC PROCESSES Inc
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Filing: 1969-10-29
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Granted: 1972-06-27
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Expires: 1989-10-29
Abstract
Abstract A fluorescent lamp jacket assembly is disclosed employing an expansible or dilatable plastic jacket which substantially encloses the entire length of the glass envelope of a fluorescent lamp and is held to the lamp by means of a pair of plastic end caps so that rupturing of the glass lamp envelope will not be accompanied by bursting or separation of the jacket or its end caps, thereby containing all the debris ensuing from the implosion reaction accompanying breaking of the fluorescent lamp.
Inventors
- 👤 Paul R Du Pont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; F; F21; F21V; F21V17/00; F21V17/04; H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; F21V25/00; F21V25/12; Y; Y10; Y10S; Y10S220/00; Y10S220/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
A reusable assembly according to claim 1 wherein said annular recess of each of said endcaps is defined by a pair of concentrically positioned, tapered wall sections, each of said pair of sections being free over a substantial portion of their length axial to said jacket to flex radially toward and away from said glass envelope of said lamp.
Claim 2
Dependent Claim
42 words
A reusable assembly according to claim 1 wherein said annular recess is provided with a subgated vent along a predetermined portion of its periphery to prevent entrapment of air in said recess thereby facilitating assembly of said jacket with said end cap.
Claim 3
Dependent Claim
37 words
A reusable assembly according to claim 1 wherein said jacket is made of poly carbonate tubing having an impact strength of approximately 14 foot-pounds, Izod and wherein said end caps are made of high heat stabilized polypropylene.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |