Patent US3862296A successfully refreshed from Google Patents.
Patent US5107580A successfully refreshed from Google Patents.
US5107580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of attaching sheet filter to inlet opening of ventilation fan or range hood
Assignee: Casle Industrial Co Ltd
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Filing: 1990-10-25
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Granted: 1992-04-28
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Expires: 2010-10-25
Abstract
Abstract A method of attaching a sheet filter to an inlet opening by covering the inlet opening with a wide sheet filter and fixing the periphery of said sheet filter to the periphery of said inlet opening by use of magnet holders or other fixing means so as to enable a replacement of only the filter which has become dirty by the use.
Inventors
- 👤 Kenji Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/02; B01D2265/00; B01D2265/02; B01D2265/023; Y; Y10; Y10S; Y10S55/00; Y10S55/06; Y10S55/36; Y10T; Y10T24/00; Y10T24/32; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49947
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
A method of attaching a sheet filter to an inlet opening of a range hood or a ventilation fan having a magnetic portion at least on the periphery thereof, comprising the steps of; covering said inlet opening and the magnetic portion of the periphery with a fire-resistant unwoven cloth which is larger than said inlet opening, and fixing said unwoven cloth to said magnetic portion by attaching a plurality of magnet holders, each of which are magnetically attached to said magnetic portion over said unwoven cloth.
Claim 2
Independent Claim
86 words
A method of attaching a sheet filter to an inlet opening of a range hood or a ventilation fan having a magnetic portion at least on the periphery thereof, comprising the steps of; covering said inlet opening and the magnetic portion of the periphery with a fire-resistant unwoven cloth which is larger than said inlet opening, and fixing said unwoven cloth to said magnetic portion by attaching a plurality of magnet holders, each of which are magnetically attached to said magnetic portion over said unwoven cloth.
Claim 3
Independent Claim
33 words
A method of attaching a sheet filter to an inlet opening according to the claim (1), wherein said magnetic portion is a magnetic plate whose periphery is provided with a projecting edge frame.
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) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |