US3168668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure mercury vapor lamp
Assignee: Honeywell Inc
•
Filing: 1961-04-03
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Granted: 1965-02-02
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Edward F Rexer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0732
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A HIGH PRESSURE MERCURY VAPOR LAMP COMPRISING A SEALED ENVELOPE CONTAINING AN IONIZABLE MEDIUM INCLUDING AN INERT STARTING GAS AND MERCURY IN A QUANTITY SUCH THAT WHEN VAPORIZED THE PRESSURE WILL BE GREATER THAN ONE ATMOSPHERE, A REFRACTORY METAL ANODE, AND A CATHODE COMPRISING A TUNGSTEN ROD MEMBER HAVING A TIP OF RHENIUM METAL PROJECTING BEYOND SAID TUNGSTEN AND INSERTED A SHORT DISTANCE INTO SAID TUNGSTEN, A COIL OF THORIATED TUNGSTEN WOUND ABOUT SAID TUNGSTEN ROD NEAR THE ARC END THEREOF, AND A TANTALUM FOIL INSERTED BETEEN SAID COIL AND SAID TUNGSTEN ROD.
Claim 2
Dependent Claim
93 words
A HIGH PRESSURE MERCURY VAPOR LAMP COMPRISING A SEALED ENVELOPE CONTAINING AN IONIZABLE MEDIUM INCLUDING AN INERT STARTING GAS AND MERCURY IN A QUANTITY SUCH THAT WHEN VAPORIZED THE PRESSURE WILL BE GREATER THAN ONE ATMOSPHERE, A REFRACTORY METAL ANODE, AND A CATHODE COMPRISING A TUNGSTEN ROD MEMBER HAVING A TIP OF RHENIUM METAL PROJECTING BEYOND SAID TUNGSTEN AND INSERTED A SHORT DISTANCE INTO SAID TUNGSTEN, A COIL OF THORIATED TUNGSTEN WOUND ABOUT SAID TUNGSTEN ROD NEAR THE ARC END THEREOF, AND A TANTALUM FOIL INSERTED BETEEN SAID COIL AND SAID TUNGSTEN ROD.
References Cited (Backward Citations)
US2391458A
Cited
US2459579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |