US4464336A
Expired / Lapsed
US
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Method of sterilization
Assignee: Ushio Denki KK
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Filing: 1982-11-29
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Granted: 1984-08-07
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Expires: 2002-11-29
Abstract
Abstract A method of sterilization effected by using a flash discharge ultraviolet lamp which provides a very large instantaneous luminescence output, destroying at an increased sterilization rate and in a reduced irradiation time microorganisms, particularly Aspergillus nigger and those organisms in the lower layers which have been difficult to destroy by the lamp method of the prior art.
Inventors
- 👤 Tatsumi Hiramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:06
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/08; A61L2/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A method of ultraviolet light sterilization comprising the steps of: (a) emitting short high intensity ultraviolet rays having a frequency of 3,000 Å or less from a flash discharge lamp containing a rare gas as a luminous component, wherein the energy density of the luminescence from the flash discharge lamp is 0.03 (J/cm 2 msec) or more and (b) applying the emitted short high intensity ultraviolet rays to microorganisms to be destroyed by the sterilizing effect of the ultraviolet rays.
Claim 2
Independent Claim
80 words
A method of ultraviolet light sterilization comprising the steps of: (a) emitting short high intensity ultraviolet rays having a frequency of 3,000 Å or less from a flash discharge lamp containing a rare gas as a luminous component, wherein the energy density of the luminescence from the flash discharge lamp is 0.03 (J/cm 2 msec) or more and (b) applying the emitted short high intensity ultraviolet rays to microorganisms to be destroyed by the sterilizing effect of the ultraviolet rays.
Claim 3
Dependent Claim
44 words
The method as defined in claim 1, wherein step (a) comprises emitting rays from a flash discharge lamp containing, in addition to the rare gas, at least one metal selected from the group consisting of mercury, zinc, cadmium and tin as another luminous component.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein in step (b) the emitted light rays are applied to microorganisms which readily absorb light rays.
Claim 5
Dependent Claim
11 words
The method of claim 3, wherein the microorganisms are Aspergillus nigger.
Claim 6
Independent Claim
14 words
The method of claims 1, 3 or 4, wherein the microorganisms are in layers.
Claim 7
Independent Claim
44 words
The method of claims 3 or 4, wherein step (a) comprises emitting rays from a flash discharge lamp containing, in addition to the rare gas, at least one metal selected from the group consisting of mercury, zinc, cadmium and tin as another luminous component.
Claim 8
Dependent Claim
42 words
The method of claim 5, wherein step (a) comprises emitting rays from a flash discharge lamp containing, in addition to the rare gas, at least one metal selected from the group consisting of mercury, zinc, cadmium and tin as another luminous component.
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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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |