US3783328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen incandescent lamp
Assignee: Osram GmbH
•
Filing: 1972-07-11
•
Granted: 1974-01-01
•
Expires: 1992-07-11
Abstract
Abstract Halogen incandescent lamps containing a tungsten filament and an inert fill gas. The lamps also contain an equimolar quantity of oxygen and fluorine in the envelope together with the inert gas. Preferably the amount of each of the oxygen and fluorine is between about 0.1 and 5 torr.
Inventors
- 👤 G Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:47
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
The incandescent lamp of claim 1 wherein the amounts of each of said oxygen and fluorine is between about 0.1 and 5 torr.
Claim 2
Dependent Claim
18 words
The incandescent lamp of claim 2 containing about 4 torr of oxygen, and about 4 torr of fluorine.
Claim 3
Dependent Claim
12 words
The incandescent lamp of claim 3 containing about 3000 torr of argon.
Claim 4
Dependent Claim
12 words
The incandescent lamp of claim 2 wherein said inert gas is argon.
Claim 5
Dependent Claim
21 words
The incandescent lamp of claim 2 wherein the amount of said inert gas fill is between 600 torr and 6,000 torr.
Claim 6
Dependent Claim
24 words
The incandescent lamp of claim 6 wherein the amount of each of said oxygen and fluorine is between about 3 torr and 4.5 torr.
Claim 7
Dependent Claim
21 words
The incandescent lamp of claim 7 wherein the amount of said inert gas fill is between 1,500 torr and 3,500 torr.
Claim 8
Dependent Claim
18 words
The incandescent lamp of claim 8 containing about 4 torr of oxygen and about 4 torr of fluorine.
References Cited (Backward Citations)
US3263113A
Cited
US3541378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |