US4276256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing bacterial passage into sterile fluid systems
Assignee: RAF-TAN Inc
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Filing: 1978-07-21
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Granted: 1981-06-30
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Expires: 1998-07-21
Abstract
Abstract An apparatus for preventing microorganisms from passing from outside into sterile closed systems containing sterile water or fluids for general or biomedical use wherein an ultraviolet light source is attached to the outlet valve, exposing it to an effective amount of ultraviolet light of a wavelength range of 2300A° to 2900A°.
Inventors
- 👤 Narbik A. Karamian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/30; C02F1/32; C02F1/325; A; A61; A61L; A61L2/00; A61L2/02; A61L2/08; A61L2/10; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4266
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A method of preventing microorganism contamination of a supply of sterile fluid stored in a reservoir, said reservoir comprising a vessel and outlet means for withdrawing fluid from said vessel, said outlet means comprising a quartz apparatus, by attaching an ultraviolet light source having a wavelength range of 2300 A° to 2900 A° at said quartz apparatus and intermittently exposing said quartz apparatus to an effective amount of ultraviolet light emitted from said light source, the exposure intervals being of such duration that said stored fluid is maintained at substantially room temperature.
Claim 2
Independent Claim
92 words
A method of preventing microorganism contamination of a supply of sterile fluid stored in a reservoir, said reservoir comprising a vessel and outlet means for withdrawing fluid from said vessel, said outlet means comprising a quartz apparatus, by attaching an ultraviolet light source having a wavelength range of 2300 A° to 2900 A° at said quartz apparatus and intermittently exposing said quartz apparatus to an effective amount of ultraviolet light emitted from said light source, the exposure intervals being of such duration that said stored fluid is maintained at substantially room temperature.
Claim 3
Dependent Claim
26 words
The method according to claim 1 wherein said outlet means further comprises a valve and said apparatus and ultraviolet light source are positioned below said valve.
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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |