Patent DE2745461B1 successfully refreshed from Google Patents.
US5034656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten halogen lamp including phosphorous and bromine
Assignee: General Electric Co
•
Filing: 1989-09-26
•
Granted: 1991-07-23
•
Expires: 2009-09-26
Abstract
Abstract Tungsten-halogen lamps operating at temperatures above 250° C. which contain a mixture of phosphine, hydrogen, bromine and inert gas have been found to have superior life and lumen maintenance when the atomic ratio of phosphorus to bromine in the lamp is in the range of from 0.4-2.5.
Inventors
- 👤 Thomas H. Yu
- 👤 Ronald J. Olwert
- 👤 Rolf S. Bergman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:22
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
55 words
A tungsten-halogen lamp comprising a hermetically sealed, light transmissive, envelope enclosing a tungsten filament and containing a mixture of inert gas, hydrogen, phosphorus and bromine wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is at least about 1/1.
Claim 2
Dependent Claim
55 words
A tungsten-halogen lamp comprising a hermetically sealed, light transmissive, envelope enclosing a tungsten filament and containing a mixture of inert gas, hydrogen, phosphorus and bromine wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is at least about 1/1.
Claim 3
Dependent Claim
12 words
The lamp of claim 1 wherein said envelope is a vitreous envelope.
Claim 4
Dependent Claim
23 words
The lamp of claim 2 wherein said inert gas is selected from the group consisting essentially of nitrogen, noble gas and mixture thereof.
Claim 5
Dependent Claim
23 words
The lamp of claim 3 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 6
Dependent Claim
17 words
The lamp of claim 4 wherein said atomic ratio of phosphorus to bromine is at least 0.45.
Claim 7
Dependent Claim
17 words
The lamp of claim 5 wherein said atomic ratio of phosphorus to bromine is at least 0.5.
Claim 8
Dependent Claim
18 words
The lamp of claim 6 wherein said atomic ratio of phosphorus to bromine is at least about 1.0.
Claim 9
Dependent Claim
72 words
A tungsten-halogen lamp for operating at a temperature above 250° C. and comprising a hermetically sealed light transmissive, vitreous envelope made of quartz or a high temperature glass enclosing a tungsten filament and containing a mixture of inert gas, hydrogen, phosphorus and bromine wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is at least one.
Claim 10
Dependent Claim
72 words
A tungsten-halogen lamp for operating at a temperature above 250° C. and comprising a hermetically sealed light transmissive, vitreous envelope made of quartz or a high temperature glass enclosing a tungsten filament and containing a mixture of inert gas, hydrogen, phosphorus and bromine wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is at least one.
Claim 11
Dependent Claim
23 words
The lamp of claim 8 wherein said inert gas is selected from the group consisting essentially of nitrogen, noble gas and mixture thereof.
Claim 12
Dependent Claim
23 words
The lamp of claim 9 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 13
Dependent Claim
17 words
The lamp of claim 10 wherein said atomic ratio of phosphorus to bromine is at least 0.45.
Claim 14
Dependent Claim
17 words
The lamp of claim 10 wherein said ratio of phosphorus to bromine is at least about 0.5.
Claim 15
Dependent Claim
19 words
The lamp of claim 10 wherein said ratio of said phosphorus to said bromine is at least about 1.0.
Claim 16
Dependent Claim
96 words
A lamp comprising a hermetically sealed, light transmissive envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein the source of said phosphorus in said lamp is selected from the group consisting essentially of elemental phosphorus, PH 3 , P 3 N 5 and mixture thereof and said bromine source comprises CH 3 Br and wherein the atomic ratio of said phosphorus to said bromine in said lamp ranges from 0.4 to 2.5 and the atomic ratio of said hydrogen to said bromine is at least one.
Claim 17
Dependent Claim
96 words
A lamp comprising a hermetically sealed, light transmissive envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein the source of said phosphorus in said lamp is selected from the group consisting essentially of elemental phosphorus, PH 3 , P 3 N 5 and mixture thereof and said bromine source comprises CH 3 Br and wherein the atomic ratio of said phosphorus to said bromine in said lamp ranges from 0.4 to 2.5 and the atomic ratio of said hydrogen to said bromine is at least one.
Claim 18
Dependent Claim
115 words
A lamp comprising a hermetically sealed light transmissive, vitreous envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein said phosphorus in said lamp is obtained by cracking a phosphorus precursor within said envelope to produce said phosphorus and at least one by-product of said cracking, removing said by-product from within said envelope, and then introducing CH 3 Br and said inert gas into said envelope in the desired amounts and sealing said envelope, wherein the atomic ratio of said phosphorus to said bromine in said envelope ranges from 0.4 to 2.5 and the atomic ratio of said hydrogen to said bromine is at least three.
Claim 19
Dependent Claim
115 words
A lamp comprising a hermetically sealed light transmissive, vitreous envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein said phosphorus in said lamp is obtained by cracking a phosphorus precursor within said envelope to produce said phosphorus and at least one by-product of said cracking, removing said by-product from within said envelope, and then introducing CH 3 Br and said inert gas into said envelope in the desired amounts and sealing said envelope, wherein the atomic ratio of said phosphorus to said bromine in said envelope ranges from 0.4 to 2.5 and the atomic ratio of said hydrogen to said bromine is at least three.
Claim 20
Dependent Claim
15 words
The lamp of claim 14 wherein said inert gas comprises one or more noble gases.
Claim 21
Dependent Claim
23 words
The lamp of claim 16 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 22
Dependent Claim
11 words
The lamp of claim 17 wherein said inert gas includes nitrogen.
Claim 23
Dependent Claim
15 words
The lamp of claim 18 wherein said phosphorus to bromine ratio is at least 0.45.
Claim 24
Dependent Claim
16 words
The lamp of claim 19 wherein said phosphorus to bromine ratio is at least about 0.5.
Claim 25
Dependent Claim
16 words
The lamp of claim 20 wherein said phosphorus to bromine ratio is at least about 1.0.
Claim 26
Dependent Claim
15 words
The lamp of claim 15 wherein said inert gas comprises one or more noble gases.
Claim 27
Dependent Claim
23 words
The lamp of claim 22 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 28
Dependent Claim
11 words
The lamp of claim 23 wherein said inert gas includes nitrogen.
Claim 29
Dependent Claim
15 words
The lamp of claim 24 wherein said phosphorus to bromine ratio is at least 0.45.
Claim 30
Dependent Claim
16 words
The lamp of claim 25 wherein said phosphorus to bromine ratio is at least about 0.5.
Claim 31
Dependent Claim
16 words
The lamp of claim 26 wherein said phosphorus to bromine ratio is at least about 1.0.
Claim 32
Dependent Claim
15 words
The lamp of claim 15 wherein said inert gas comprises one or more noble gases.
Claim 33
Dependent Claim
23 words
The lamp of claim 28 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 34
Dependent Claim
11 words
The lamp of claim 29 wherein said inert gas includes nitrogen.
Claim 35
Dependent Claim
15 words
The lamp of claim 30 wherein said phosphorus to bromine ratio is at least 0.45.
Claim 36
Dependent Claim
16 words
The lamp of claim 31 wherein said phosphorus to bromine ratio is at least about 0.5.
Claim 37
Dependent Claim
16 words
The lamp of claim 32 wherein said phosphorus to bromine ratio is at least about 1.0.
Claim 38
Dependent Claim
56 words
A lamp comprising a hermetically sealed, light transmissive, vitreous envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is greater than 3.0.
Claim 39
Dependent Claim
56 words
A lamp comprising a hermetically sealed, light transmissive, vitreous envelope enclosing a tungsten filament within and containing a mixture of inert gas, hydrogen, phosphorus, bromine and carbon wherein the atomic ratio of said phosphorus to said bromine ranges from about 0.4-2.5 and wherein the atomic ratio of said hydrogen to said bromine is greater than 3.0.
Claim 40
Dependent Claim
14 words
The lamp of claim 34 wherein inert gas comprises one or more noble gases.
Claim 41
Dependent Claim
23 words
The lamp of claim 25 wherein said noble gas is selected from the group consisting essentially of xenon, argon, krypton and mixture thereof.
Claim 42
Dependent Claim
11 words
The lamp of claim 36 wherein said inert gas includes nitrogen.
Claim 43
Dependent Claim
16 words
The lamp of claim 37 wherein said phosphorus to bromine atomic ratio is at least 0.45.
Claim 44
Dependent Claim
15 words
The lamp of claim 38 wherein said phosphorus to bromine ratio is at least 0.5.
Claim 45
Dependent Claim
16 words
The lamp of claim 39 wherein said phosphorus to bromine ratio is at least about 1.0.
References Cited (Backward Citations)
US3712701A
Cited
US3800180A
Cited
US4727286A
Cited
US4629936A
Cited
US4629935A
Cited
US4748376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |