Patent US5203625A successfully refreshed from Google Patents.
US5203625A
Expired / Lapsed
US
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Diffusion system
Assignee: DN Labs Inc
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Filing: 1992-01-06
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Granted: 1993-04-20
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Expires: 2012-01-06
Abstract
Abstract A mixture of approximately 95% barium sulfate and 5% polyvinyl alcohol in powdered form is mixed into a solvent, heated and sprayed onto a diffusion surface to be used in conjunction with high-intensity lamps ranging from 200 watts to 18 kilowatts to convert the irregular lighting from these sources to a smooth, broad, even diffused source suitable for use in motion picture and television settings and other situations in which a very bright, but soft, evenly dispersed light is desirable.
Inventors
- 👤 Daniel Naum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:22
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/22; F21V7/24; F21V7/28; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
Add-on diffuser module attachment for a high-intensity HMI lamp having a light source within a light casing and having spaced filter mounting supports extending from said casing, said diffuser module attachment comprising: (a) a housing having a light entrance opening and a light exit opening approximately 90° from said entrance opening and spaced screw mounts position about said light entrance opening and adapted to engage said filter mounting supports to mount said housing to the casing of a high-intensity lamp; (b) said housing defining a primary reflecting surface at an angle of on the order of 45° between said light entrance opening and said light exit opening; and (c) substantially the complete interior surface of said enclosure including all of said primary reflective surface having a coating of highly diffusive material comprising on the order of 95% barium sulfate thereon such that light form a high-intensity lamp to which said housing is mounted will be diffused and integrated and exit through said opening as high-intensity lambertian light.
Claim 2
Dependent Claim
167 words
Add-on diffuser module attachment for a high-intensity HMI lamp having a light source within a light casing and having spaced filter mounting supports extending from said casing, said diffuser module attachment comprising: (a) a housing having a light entrance opening and a light exit opening approximately 90° from said entrance opening and spaced screw mounts position about said light entrance opening and adapted to engage said filter mounting supports to mount said housing to the casing of a high-intensity lamp; (b) said housing defining a primary reflecting surface at an angle of on the order of 45° between said light entrance opening and said light exit opening; and (c) substantially the complete interior surface of said enclosure including all of said primary reflective surface having a coating of highly diffusive material comprising on the order of 95% barium sulfate thereon such that light form a high-intensity lamp to which said housing is mounted will be diffused and integrated and exit through said opening as high-intensity lambertian light.
References Cited (Backward Citations)
US1820543A
Cited
US4276633A
Cited
US4429004A
Cited
US4521834A
Cited
US4735495A
Cited
US5023758A
Cited
US5101325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |