US4049987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ozone absorbance controller
Assignee: Applied Biosystems Inc
•
Filing: 1976-06-04
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Granted: 1977-09-20
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Expires: 1996-06-04
Abstract
Abstract An ozone absorbance controller for use with an ultraviolet light source, which includes a vented, trapped gas filter disposed in the optical emission path of said ultraviolet light source to absorb high energy ultraviolet rays of wavelengths below about 200 nanometers, and thereby substantially preventing the formation of ozone in the optical emission path subsequent to the filter.
Inventors
- 👤 Charles Carlyle Helms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
An ozone absorbance controller for use with an ultraviolet light source comprising a trapped gas filter disposed in an optical emission path of said ultraviolet light source to absorb high energy ultraviolet rays of wave lengths below about 200 nanometers, and to thereby substantially prevent the formation of ozone in said optical emission path subsequent to said filter, said trapped gas filter being vented with a single opening sufficiently large to permit pressure equalization between the gases in the filter and atmosphere yet small enough to prevent gas movement within the gas filter after pressure equalization.
Claim 2
Dependent Claim
96 words
An ozone absorbance controller for use with an ultraviolet light source comprising a trapped gas filter disposed in an optical emission path of said ultraviolet light source to absorb high energy ultraviolet rays of wave lengths below about 200 nanometers, and to thereby substantially prevent the formation of ozone in said optical emission path subsequent to said filter, said trapped gas filter being vented with a single opening sufficiently large to permit pressure equalization between the gases in the filter and atmosphere yet small enough to prevent gas movement within the gas filter after pressure equalization.
Claim 3
Dependent Claim
28 words
An ozone absorbance controller for use with an ultraviolet light source according to claim 1 wherein said trapped gas is a body of air vented to ambient atmosphere.
Claim 4
Dependent Claim
114 words
An ozone absorbance controller for use with an ultraviolet lamp comprising an envelope disposed substantially around said lamp in spaced relationship with respect thereto, said lamp having a transmission window and said envelope having a second transmission window substantially in alignment therewith, each said window being made of an ultraviolet transmitting material, said space between the lamp and the envelope containing a trapped gas, and said envelope having a vent opening to ambient atmosphere for said trapped gas, said vent comprising a single opening sufficiently large to permit pressure equalization of said trapped gas and ambient atmosphere yet small enough to prevent gas movement in the region disposed between said windows after pressure equalization.
Claim 5
Dependent Claim
114 words
An ozone absorbance controller for use with an ultraviolet lamp comprising an envelope disposed substantially around said lamp in spaced relationship with respect thereto, said lamp having a transmission window and said envelope having a second transmission window substantially in alignment therewith, each said window being made of an ultraviolet transmitting material, said space between the lamp and the envelope containing a trapped gas, and said envelope having a vent opening to ambient atmosphere for said trapped gas, said vent comprising a single opening sufficiently large to permit pressure equalization of said trapped gas and ambient atmosphere yet small enough to prevent gas movement in the region disposed between said windows after pressure equalization.
Claim 6
Dependent Claim
20 words
An ozone absorbance controller for use with an ultraviolet lamp according to claim 3 wherein said trapped gas is air.
Claim 7
Dependent Claim
22 words
An ozone absorbance controller for use with an ultraviolet lamp according to claim 3 wherein said lamp is a deuterium arc lamp.
Claim 8
Dependent Claim
35 words
An ozone absorbance controller for use with an ultraviolet lamp according to claim 3 wherein said envelope is spaced from said lamp a distance of the order of from about 1.0 to about 3.0 millimeters.
Claim 9
Dependent Claim
25 words
An ozone absorbance controller for use with ultraviolet lamp according to claim 3 wherein said vent opening is disposed towards the bottom of said envelope.
Claim 10
Dependent Claim
30 words
An ozone absorbance controller for use with an ultraviolet lamp according to claim 7 wherein said vent opening has a diameter of from about 0.25 millimeters to about 0.50 millimeters.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |