Patent US6419729B1 successfully refreshed from Google Patents.
US6419729B1
Expired / Lapsed
US
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Filter assemblies with adhesive attachment systems
Assignee: 3M Innovative Properties Co
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Filing: 2000-04-17
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Granted: 2002-07-16
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Expires: 2020-04-17
Abstract
Abstract Filter assemblies with adhesive attachment systems are provided. In one embodiment, a filter assembly includes a porous filter member and an adhesive disposed on a reinforcement scrim adhesively attached to at least a portion of at least one major surface of the porous filter member, wherein the reinforcement scrim has discrete open areas. In an alternative embodiment, a filter assembly includes a porous filter member that includes fibrous filter media and an adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions.
Inventors
- 👤 Dean R. Duffy
- 👤 William M. Stevenson
- 👤 John F. Reed
- 👤 David J. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:38
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1607; B01D39/1623; B01D39/163; B01D39/20; B01D39/2003; B01D39/2017; Y; Y10; Y10S; Y10S55/00; Y10S55/35; Y10S55/39
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
50 words
A filter assembly comprising: a porous filter member; and a pressure sensitive adhesive disposed on a reinforcement scrim adhesively attached to at least a portion of at least one major surface of the porous filter member with the same pressure sensitive adhesive, wherein the reinforcement scrim has discrete open areas.
Claim 2
Dependent Claim
50 words
A filter assembly comprising: a porous filter member; and a pressure sensitive adhesive disposed on a reinforcement scrim adhesively attached to at least a portion of at least one major surface of the porous filter member with the same pressure sensitive adhesive, wherein the reinforcement scrim has discrete open areas.
Claim 3
Dependent Claim
25 words
The filter assembly of claim 1 wherein the reinforcement scrim discrete open areas have an average effective circular diameter of at least about 300 microns.
Claim 4
Dependent Claim
18 words
The filter assembly of claim 1 wherein the reinforcement scrim is formed from a thermoplastic polymer or fiberglass.
Claim 5
Dependent Claim
21 words
The filter assembly of claim 1 wherein the filter member comprises a fibrous nonwoven web, a foam, or a porous membrane.
Claim 6
Dependent Claim
15 words
The filter assembly of claim 4 wherein the filter member comprises a fibrous nonwoven web.
Claim 7
Dependent Claim
13 words
The filter assembly of claim 1 wherein the filter member comprises electret fibers.
Claim 8
Dependent Claim
13 words
The filter assembly of claim 6 wherein the electret fibers comprise a polyolefin.
Claim 9
Dependent Claim
12 words
The filter assembly of claim 7 wherein the polyolefin is a polypropylene.
Claim 10
Dependent Claim
30 words
The filter assembly of claim 6 wherein the filter member comprises an electret split fiber web, an electret spunbond web, an electret tribocharged web, or an electret melt blown web.
Claim 11
Dependent Claim
16 words
The filter assembly of claim 9 wherein the filter member comprises an electret split fiber web.
Claim 12
Dependent Claim
24 words
The filter assembly of claim 1 wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive, poly(alpha-olefin)-based adhesive, synthetic rubber-based adhesive, or a silicone-based adhesive.
Claim 13
Dependent Claim
15 words
The filter assembly of claim 11 wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
Claim 14
Dependent Claim
27 words
The filter assembly of claim 1 wherein the scrim is adhesively attached to the entire surface of at least one major surface of the porous filter member.
Claim 15
Dependent Claim
26 words
The filter assembly of claim 1 wherein the scrim is adhesively attached to discrete regions of at least one major surface of the porous filter member.
Claim 16
Dependent Claim
26 words
The filter assembly of claim 14 wherein the scrim is adhesively attached to the periphery of at least one major surface of the porous filter member.
Claim 17
Dependent Claim
16 words
The filter assembly of claim 1 wherein the filter member comprises absorptive or adsorptive particles .
Claim 18
Dependent Claim
52 words
A filter assembly comprising: a porous filter member comprising fibrous filter media; and a pressure sensitive adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions.
Claim 19
Dependent Claim
52 words
A filter assembly comprising: a porous filter member comprising fibrous filter media; and a pressure sensitive adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions.
Claim 20
Dependent Claim
15 words
The filter assembly of claim 17 wherein the filter member comprises a fibrous nonwoven web.
Claim 21
Dependent Claim
13 words
The filter assembly of claim 17 wherein the filter member comprises electret fibers.
Claim 22
Dependent Claim
13 words
The filter assembly of claim 19 wherein the electret fibers comprise a polyolefin.
Claim 23
Dependent Claim
12 words
The filter assembly of claim 20 wherein the polyolefin is a polypropylene.
Claim 24
Dependent Claim
30 words
The filter assembly of claim 19 wherein the filter member comprises an electret split fiber web, an electret spunbond web, an electret tribocharged web, or an electret melt blown web.
Claim 25
Dependent Claim
16 words
The filter assembly of claim 22 wherein the filter member comprises an electret split fiber web.
Claim 26
Dependent Claim
24 words
The filter assembly of claim 17 wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive, poly(alpha-olefin)-based adhesive, synthetic rubber-based adhesive, or a silicone-based adhesive.
Claim 27
Dependent Claim
15 words
The filter assembly of claim 24 wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
Claim 28
Dependent Claim
15 words
The filter assembly of claim 17 further comprising a release liner disposed on the adhesive.
Claim 29
Dependent Claim
14 words
The filter assembly of claim 26 wherein the release liner forms a finger-lift tab.
Claim 30
Dependent Claim
57 words
A filter assembly comprising: a porous filter member; and a pressure sensitive adhesive disposed on a reinforcement scrim adhesively attached to the periphery of at least one major surface of the porous filter member with the same pressure sensitive adhesive, wherein the reinforcement scrim has discrete open areas; wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
Claim 31
Dependent Claim
57 words
A filter assembly comprising: a porous filter member; and a pressure sensitive adhesive disposed on a reinforcement scrim adhesively attached to the periphery of at least one major surface of the porous filter member with the same pressure sensitive adhesive, wherein the reinforcement scrim has discrete open areas; wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
Claim 32
Dependent Claim
70 words
A filter assembly comprising: a porous filter member comprising fibrous filter media; and a pressure sensitive adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions; wherein the filter member comprises electret fibers; and further wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
Claim 33
Dependent Claim
70 words
A filter assembly comprising: a porous filter member comprising fibrous filter media; and a pressure sensitive adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions; wherein the filter member comprises electret fibers; and further wherein the pressure sensitive adhesive comprises a (meth)acrylic-based adhesive.
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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) | 2005-07-15 | 2006-01-14 | 2006-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-15 | 2010-01-14 | 2010-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-15 | 2014-01-14 | 2014-07-16 | $7700.00 | Window Closed / Lapsed |