Patent US3589106A successfully refreshed from Google Patents.
US3589106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-permeable sterilizer filter
Assignee: Individual
•
Filing: 1969-03-17
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Granted: 1971-06-29
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Expires: 1989-03-17
Abstract
Abstract A filter for sterilizing the air at site of a telephone mouthpiece, a speaking window and an air outlet of an airconditioning system. A porous sheet member is impregnated with a sterilizer solution which acts to sterilize the air before it is breathed in. The sheet member has a coating film which is adapted to keep the filter clean and to control the evaporation of the sterilizer solution.
Inventors
- 👤 Michiko Onuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:18
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/01; A61L9/015; A61L9/04; A61L9/042; F; F24; F24F; F24F8/00; F24F8/20; F24F8/24; H; H04; H04R; H04R1/00; H04R1/12; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
An air-permeable sterilizer filter comprising a porous filter fibrous sheet member made of antidegeneration material, said sheet member being impregnated with liquid benzalkonium chloride, both sides of said sheet member being coated with a silicone film which is insoluble with said disinfectant and which prevents said sheet from fluffing and absorbing moisture, said silicone film being capable of controlling the evaporation of said liquid benzalkonium chloride disinfectant and of keeping said sheet member clean.
Claim 2
Dependent Claim
74 words
An air-permeable sterilizer filter comprising a porous filter fibrous sheet member made of antidegeneration material, said sheet member being impregnated with liquid benzalkonium chloride, both sides of said sheet member being coated with a silicone film which is insoluble with said disinfectant and which prevents said sheet from fluffing and absorbing moisture, said silicone film being capable of controlling the evaporation of said liquid benzalkonium chloride disinfectant and of keeping said sheet member clean.
Claim 3
Dependent Claim
19 words
A sterilizer filter as claimed in claim 1, wherein the sheet member is formed with fine mesh glass fibers.
Claim 4
Dependent Claim
17 words
A sterilizer filter as claimed in claim 1, wherein the sheet member is formed with foamed plastic.
Claim 5
Dependent Claim
26 words
A sterilizer filter as claimed in claim 1, wherein the sheet member is incorporated into a cap for a mouthpiece by means of a grating member.
Claim 6
Dependent Claim
18 words
A sterilizer filter as claimed in claim 1, wherein said sheet member is impregnated with a perfume-type substance.
Claim 7
Dependent Claim
27 words
A sterilizer filter as claimed in claim 1, wherein the sheet member is incorporated into a cap for a telephone earpiece by means of a grating member.
Claim 8
Dependent Claim
25 words
A sterilizer filter as claimed in claim 1, wherein the sheet member is incorporated into a speaking window structure by means of a grating member.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |