US4058752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosimetry control method
Assignee: GTE Sylvania Inc
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Filing: 1976-09-09
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Granted: 1977-11-15
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Expires: 1996-09-09
Abstract
Abstract In a method of operating a photochemotherapy chamber for the irradiation of a patient with long wave ultraviolet light, a prescribed dosage is first selected. The prescribed dosage is then automatically converted into the time duration that an ultraviolet source should be energized to deliver said dosage by monitoring the line voltage and the total hours of operation of the ultraviolet source and adjusting said time duration accordingly.
Inventors
- 👤 William C. Woods
- 👤 Robert E. Levin
- 👤 Richard H. Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:25
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; A61N5/0613; A61N5/062; H; H05; H05B; H05B47/00; H05B47/10; H05B47/16; H05B47/20; A61N2005/0635; A61N2005/0636; Y; Y02; Y02B; Y02B20/00; Y02B20/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
The method of operating a photochemotherapy chamber for the irradiation of a patient with long wave ultraviolet light comprising the steps of: 1. selecting a prescribed dosage of long wave ultraviolet radiation; 2. automatically converting said prescribed dosage into the time duration that an ultraviolet source should be energized to deliver said dosage by a. monitoring the line voltage delivered to said ultraviolet source and establishing said time duration in accordance with the deviation of said line voltage from a predetermined value and b. monitoring the hours of operation of said ultraviolet source and establishing said time duration in accordance with a nonlinear curve of output versus hours of operation for said ultraviolet source; and 3. exposing the patient to said ultraviolet radiation for said time duration.
Claim 2
Independent Claim
127 words
The method of operating a photochemotherapy chamber for the irradiation of a patient with long wave ultraviolet light comprising the steps of: 1. selecting a prescribed dosage of long wave ultraviolet radiation; 2. automatically converting said prescribed dosage into the time duration that an ultraviolet source should be energized to deliver said dosage by a. monitoring the line voltage delivered to said ultraviolet source and establishing said time duration in accordance with the deviation of said line voltage from a predetermined value and b. monitoring the hours of operation of said ultraviolet source and establishing said time duration in accordance with a nonlinear curve of output versus hours of operation for said ultraviolet source; and 3. exposing the patient to said ultraviolet radiation for said time duration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |