US3294468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing fluorescent lamps
Assignee: Duro Test Corp
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Filing: 1965-02-05
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Granted: 1966-12-27
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Expires: 1985-02-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Emidy
- 👤 Donald P Northrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE MANUFACTURE OF AN ELECTRON DISCHARGE DEVICE COMPRISING A BULB HAVING INLET AND OUTLET CONNECTIONS AT OPPOSITE ENDS AND AT LEAST ONE ELECTRON EMISSIVE ELECTRODE THEREIN, THE STEPS OF PASSING A FLUSHING GAS THROUGH SAID BULB FROM SAID INLET CONNECTION TO SAID OUTLET CONNECTION TO FLUSH THE AIR FROM SAID BULB TO THE ATMOSPHERE, HEATING SAID DEVICE TO ACTIVATE ITS CATHODE AND DRIVE OFF THE OCCLUDED GASES WHILE CONTINUING SAID FLUSHING STEP, SEALING OFF SAID OUTLET CONNECTION, WITHDRAWING THE FLUSHING GAS FROM SAID BULB TO A FINAL PREDETERMINED PRESSURE, INTRODUCING A PREDETERMINED QUANTITY OF MERCURY INTO SAID BULB AND SEALING OFF SAID INLET CONNECTION.
Claim 2
Dependent Claim
105 words
IN THE MANUFACTURE OF AN ELECTRON DISCHARGE DEVICE COMPRISING A BULB HAVING INLET AND OUTLET CONNECTIONS AT OPPOSITE ENDS AND AT LEAST ONE ELECTRON EMISSIVE ELECTRODE THEREIN, THE STEPS OF PASSING A FLUSHING GAS THROUGH SAID BULB FROM SAID INLET CONNECTION TO SAID OUTLET CONNECTION TO FLUSH THE AIR FROM SAID BULB TO THE ATMOSPHERE, HEATING SAID DEVICE TO ACTIVATE ITS CATHODE AND DRIVE OFF THE OCCLUDED GASES WHILE CONTINUING SAID FLUSHING STEP, SEALING OFF SAID OUTLET CONNECTION, WITHDRAWING THE FLUSHING GAS FROM SAID BULB TO A FINAL PREDETERMINED PRESSURE, INTRODUCING A PREDETERMINED QUANTITY OF MERCURY INTO SAID BULB AND SEALING OFF SAID INLET CONNECTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |