US3683227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure mercury-vapor gas-discharge fluorescent lamp with amalgam
Assignee: Individual
•
Filing: 1971-04-08
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Granted: 1972-08-08
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Expires: 1991-04-08
Abstract
Abstract A low-pressure mercury-vapor gas-discharge fluorescent lamp contains an amalgam of the formulation: MERCURY 15-20 AT. PER CENT LEAD 45-75 AT. PER CENT BISMUTH 40-05 AT. PER CENT ENSURING AN OPTIMUM LUMINOUS FLUX IN THE TEMPERATURE RANGE FROM 10* TO 35* C. and preventing the escape of mercury into the surrounding premises.
Inventors
- 👤 Jury Iosifovich Shindelman
- 👤 Galina Iosifovna Akulova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/24
Claims Analysis
Total Claims: 0
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |