Patent US3328573A successfully refreshed from Google Patents.
US3328573A
Expired / Lapsed
US
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Explosion-proof joint
Assignee: BRAND-REX WILLIMATIC CT
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Filing: 1965-09-08
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Granted: 1967-06-27
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Nava
- 👤 John M Tums
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:50
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; F21V; F21V25/00; F21V25/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN EXPLOSION-PROOF LAMP FIXTURE COMPRISING A BODY MEMBER MADE OF METAL HAVING AN ELECTRICAL MOUNTING MEANS THEREIN FOR AN ELECTRICAL LIGHT SOURCE WHICH CONSTITUTES A FLAME PROPAGATING HAZARD, A GLASS MEMBER FOR ASSEMBLY THEREWITH THROUGH WHICH RAYS OF LIGHT MAY BE PROJECTED, AND A RETAINER HOLDING SAID MEMBERS IN FIRM ASSEMBLY WITH ONE ANOTHER, SAID MEMBERS HAVING AN ABUTMENT JOINT FORMED THEREBETWEEN INCLUDING A GROOVE EXTENDING THROUGHOUT THE EXTENT OF SAID JOINT AND FORMED IN SAID METAL MEMBER AND A CONFRONTING FLAT SURFACE ON SAID GLASS MEMBER, AND A GASKET IN SAID GROOVE HAVING A PORTION PROJECTING OUT OF SAID GROOVE INTO ENGAGEMENT WITH SAID FLAT SURFACE,
Claim 2
Dependent Claim
107 words
AN EXPLOSION-PROOF LAMP FIXTURE COMPRISING A BODY MEMBER MADE OF METAL HAVING AN ELECTRICAL MOUNTING MEANS THEREIN FOR AN ELECTRICAL LIGHT SOURCE WHICH CONSTITUTES A FLAME PROPAGATING HAZARD, A GLASS MEMBER FOR ASSEMBLY THEREWITH THROUGH WHICH RAYS OF LIGHT MAY BE PROJECTED, AND A RETAINER HOLDING SAID MEMBERS IN FIRM ASSEMBLY WITH ONE ANOTHER, SAID MEMBERS HAVING AN ABUTMENT JOINT FORMED THEREBETWEEN INCLUDING A GROOVE EXTENDING THROUGHOUT THE EXTENT OF SAID JOINT AND FORMED IN SAID METAL MEMBER AND A CONFRONTING FLAT SURFACE ON SAID GLASS MEMBER, AND A GASKET IN SAID GROOVE HAVING A PORTION PROJECTING OUT OF SAID GROOVE INTO ENGAGEMENT WITH SAID FLAT SURFACE,
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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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |