Patent US3983439A successfully refreshed from Google Patents.
US3983439A
Expired / Lapsed
US
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Mercury vapor discharge lamp with mercury container in envelope exhaust tube
Assignee: US Philips Corp
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Filing: 1975-03-20
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Granted: 1976-09-28
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Expires: 1995-03-20
Abstract
Abstract A mercury vapor discharge lamp in which a plate-shaped container is present in the exhaust tube, the container is held in its place in the exhaust tube by a constriction in the container which cooperates with an indentation in the exhaust tube.
Inventors
- 👤 Cornelis Wilhelmus Adrianus Blommerde
- 👤 Johannes Antonius Maria Ridders
- 👤 Huibregt Westerbeke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:18
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/395
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A mercury vapour discharge lamp which comprises a lamp envelope and an exhaust tube in fluid communication with the interior of said envelope, said exhaust tube including a closed metal container in which a quantity of mercury in a metallic form is disposed in a reservoir section, said container being at least plate-shaped for a portion thereof and dimensioned and configured to allow fluid flow within said tube, said container having a constriction at one axial location, and said exhaust tube having a constriction at one axial location, said constrictions cooperating to constrain movement of said container with respect to said exhaust tube.
Claim 2
Dependent Claim
103 words
A mercury vapour discharge lamp which comprises a lamp envelope and an exhaust tube in fluid communication with the interior of said envelope, said exhaust tube including a closed metal container in which a quantity of mercury in a metallic form is disposed in a reservoir section, said container being at least plate-shaped for a portion thereof and dimensioned and configured to allow fluid flow within said tube, said container having a constriction at one axial location, and said exhaust tube having a constriction at one axial location, said constrictions cooperating to constrain movement of said container with respect to said exhaust tube.
Claim 3
Dependent Claim
21 words
A mercury vapour discharge lamp as claimed in claim 1 wherein said container has the general shape of the numeral eight.
Claim 4
Dependent Claim
24 words
A mercury vapour discharge lamp as claimed in claim 1 wherein said constriction is disposed in the portion of said container which is plate-shaped.
Claim 5
Dependent Claim
21 words
A mercury vapour discharge lamp as claimed in claim 3 wherein said portion further includes an incision in the longitudinal direction.
Claim 6
Dependent Claim
32 words
A mercury vapour discharge lamp as claimed in claim 3 wherein said container consists of a tube which is squeezed over that part of the length thereof which is outside said reservoir.
Claim 7
Dependent Claim
23 words
A mercury vapour discharge lamp as claimed in claim 5 wherein said container has a weld intermediate said reservoir and the squeezed part.
References Cited (Backward Citations)
US2640945A
Cited
US3688148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |