US3218510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric high pressure discharge lamp of high luminous intensity
Assignee: Osram GmbH
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Filing: 1961-07-21
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Granted: 1965-11-16
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Expires: 1981-07-21
Abstract
No abstract record available.
Inventors
- 👤 Schulz Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:27
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/84; H01J61/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
AN ELECTRIC DISHARGE LAMP COMPRISING: (A) A RADIATION-TRANSMITTING ENVELOPE; (B) AN IONIZABLE GASEOUS FILLING WITHIN SAID ENVELOPE IN SUCH AMOUNT AS TO ATTAIN PREDETERMINED HIGH PRESSURE DURING OPERATION OF SAID LAMP; (C) AN ANODE MEANS AND A FIRST CATHODE MEANS WITHIN SAID ENVELOPE AND ELECTRICALLY CONNECTING TO CURRENT INLEADS SEALED THROUGH SAID ENVELOPE, SAID ANODE MEANS AND SAID FIRST CATHODE MEANS CONNECTED TO A FIRST SOURCE OF ENERGIZING ELECTRIC POTENTIAL TO GENERATE A CONTINUOUS GASEOUS DISCHARGE THEREBETWEEN; (D) A SECOND CATHODE MEANS OF PREDETERMINED DIMENSIONS POSITIONED WITHIN SAID ENVELOPE AND ELECTRICALLY CONNECTED TO A CURRENT INLEAD SEALED THROUGH SAID ENVELOPE, SAID SECOND CATHODE MEANS COMPRISING A REFRACTORY MATERIAL BODY WHICH CARRIES ADDITIONAL ELECTRON-EMISSIVE MATERIAL HAVING A WORK FUNCTION LESS THAN THAT OF THE REFRACTORY MATERIAL BODY, AND SAID
Claim 2
Dependent Claim
128 words
AN ELECTRIC DISHARGE LAMP COMPRISING: (A) A RADIATION-TRANSMITTING ENVELOPE; (B) AN IONIZABLE GASEOUS FILLING WITHIN SAID ENVELOPE IN SUCH AMOUNT AS TO ATTAIN PREDETERMINED HIGH PRESSURE DURING OPERATION OF SAID LAMP; (C) AN ANODE MEANS AND A FIRST CATHODE MEANS WITHIN SAID ENVELOPE AND ELECTRICALLY CONNECTING TO CURRENT INLEADS SEALED THROUGH SAID ENVELOPE, SAID ANODE MEANS AND SAID FIRST CATHODE MEANS CONNECTED TO A FIRST SOURCE OF ENERGIZING ELECTRIC POTENTIAL TO GENERATE A CONTINUOUS GASEOUS DISCHARGE THEREBETWEEN; (D) A SECOND CATHODE MEANS OF PREDETERMINED DIMENSIONS POSITIONED WITHIN SAID ENVELOPE AND ELECTRICALLY CONNECTED TO A CURRENT INLEAD SEALED THROUGH SAID ENVELOPE, SAID SECOND CATHODE MEANS COMPRISING A REFRACTORY MATERIAL BODY WHICH CARRIES ADDITIONAL ELECTRON-EMISSIVE MATERIAL HAVING A WORK FUNCTION LESS THAN THAT OF THE REFRACTORY MATERIAL BODY, AND SAID
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |