Patent US3644772A successfully refreshed from Google Patents.
US3644772A
Expired / Lapsed
US
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Halogen lamp
Assignee: Toshiba Corp
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Filing: 1970-04-16
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Granted: 1972-02-22
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Expires: 1990-04-16
Abstract
Abstract A lamp having a bulb in which a halide substance and a nitrogen or inert gas are sealed. The halide substance to be sealed is in the form of chloroform which amounts to 0.01 to 0.10 micromol per cubic centimeter of the volume of the bulb.
Inventors
- 👤 Yooji Yuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:45
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 0
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |