Patent US4294599A successfully refreshed from Google Patents.
US4294599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerosol filter cartridge
Assignee: Cabot Safety Intermediate LLC
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Filing: 1980-02-19
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Granted: 1981-10-13
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Expires: 2000-02-19
Abstract
Abstract An aerosol respirator cartridge employing a prefilter having the form of a closely spiraled fiberglass mat functioning to distribute captured aerosol particles substantially uniformly therethrough for avoidance of prior art aerosol skin affect and the accompanying increased inhalation resistance.
Inventors
- 👤 William R. Grovesteen
- 👤 John A. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:57
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; A; A62; A62B; A62B23/00; A62B23/02; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; Y; Y10; Y10S; Y10S55/00; Y10S55/33; Y10S55/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
In an aerosol filter cartridge having a shell containing an air filtering system including final filtering components, the improvement of a prefiltering component comprising: an elongated mat of glass fibers, said mat being closely spiraled with opposite edges thereof providing opposite air-receiving and air-emitting faces of said component, one of said faces being adjacent to said final filtering components and a side of said spiraled mat being closely fitted against said shell.
Claim 2
Dependent Claim
72 words
In an aerosol filter cartridge having a shell containing an air filtering system including final filtering components, the improvement of a prefiltering component comprising: an elongated mat of glass fibers, said mat being closely spiraled with opposite edges thereof providing opposite air-receiving and air-emitting faces of said component, one of said faces being adjacent to said final filtering components and a side of said spiraled mat being closely fitted against said shell.
Claim 3
Dependent Claim
15 words
The improvement according to claim 1 wherein said fibers of said mat are randomly oriented.
Claim 4
Dependent Claim
29 words
The improvement according to claim 1 wherein said mat has a greater width dimension than thickness and said side thereof fitted against said shell is of said width dimension.
Claim 5
Dependent Claim
18 words
The improvement according to claim 3 wherein said opposite edges of said mat are of said thickness dimension.
Claim 6
Dependent Claim
15 words
The improvement according to claim 1 wherein said fibers of said mat are bonded together.
Claim 7
Dependent Claim
20 words
The improvement according to claim 5 wherein said bonding of said fibers is effected with a thermal setting organic resin.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |