Patent US3719853A successfully refreshed from Google Patents.
US3719853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen lamps containing methyl bromide or methylene chloride
Assignee: Toshiba Corp
•
Filing: 1971-08-04
•
Granted: 1973-03-06
•
Expires: 1991-08-04
Abstract
Abstract A lamp exhibiting a long life characteristic includes in a bulb a mixture of methyl bromide and methylene chloride, the amount of methyl bromide and methylene chloride being respectively within the range of 0.03 to 0.55 Mu mol and 0.02 to 0.25 Mu mol per cc of the volume of the bulb.
Inventors
- 👤 K Sugano
- 👤 Y Yuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:05
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A halogen lamp comprising a bulb, a tungsten filament accommodated in the bulb, at least one gas selected from the group consisting of nitrogen gas and inert gas sealed in the bulb, and a mixture consisting of methyl bromide and methylene chloride, the amounts of methyl bromide and methylene chloride being respectively within the range of 0.03 to 0.55 Mu mol per cc and 0.02 to 0.25 Mu mol per cc of the volume of the bulb.
Claim 2
Dependent Claim
77 words
A halogen lamp comprising a bulb, a tungsten filament accommodated in the bulb, at least one gas selected from the group consisting of nitrogen gas and inert gas sealed in the bulb, and a mixture consisting of methyl bromide and methylene chloride, the amounts of methyl bromide and methylene chloride being respectively within the range of 0.03 to 0.55 Mu mol per cc and 0.02 to 0.25 Mu mol per cc of the volume of the bulb.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |