Patent US4875899A successfully refreshed from Google Patents.
US4875899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter system with an incorporated gas escape opening, intended to be fitted in artificial anus drainage bags during their manufacture
Assignee: Laboratoires Merck Clevenot SA
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Filing: 1988-05-06
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Granted: 1989-10-24
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Expires: 2008-05-06
Abstract
Abstract The invention relates to a filter system with a gas space opening, intended to be fitted in artificial anus drainage bags. This filter system is composed of a flattened oblong body comprising a core sheet, for example of open-cell expanded plastic material, impregnated with an adsorbent active material and covered by a protective film leaving free the end edges of the core sheet.
Inventors
- 👤 Henri Holtermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:41
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/44; A61F5/441
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A substantially flat elongated gas filter system suitable for incorporation within and as part of an artificial anus drainage bag, the gas filter system having two ends, two sides, two faces, a central permeable core sheet impregnated with adsorbent active material and surrounded by gas impermeable protective plastic material which is in direct contact with the central permeable core sheet throughout its entire length, and at least one gas escape opening in the protective plastic material on one of the faces, the two ends being free from the gas impermeable plastic material and thus comprising further gas escape openings.
Claim 2
Dependent Claim
99 words
A substantially flat elongated gas filter system suitable for incorporation within and as part of an artificial anus drainage bag, the gas filter system having two ends, two sides, two faces, a central permeable core sheet impregnated with adsorbent active material and surrounded by gas impermeable protective plastic material which is in direct contact with the central permeable core sheet throughout its entire length, and at least one gas escape opening in the protective plastic material on one of the faces, the two ends being free from the gas impermeable plastic material and thus comprising further gas escape openings.
Claim 3
Dependent Claim
20 words
A filter system as claimed in claim 6 wherein the central permeable core sheet is composed of open-cell expanded polyurethane.
Claim 4
Dependent Claim
15 words
A filter system as claimed in claim 1, wherein the adsorbent material is activated carbon.
Claim 5
Dependent Claim
15 words
A filter system as claimed in claim 1, wherein the adsorbent material is zinc ricinoleate.
Claim 6
Dependent Claim
24 words
A filter as claimed in claim 1 wherein the central permeable core sheet is composed of nonwoven fabric or of open-cell expanded plastic material.
Claim 7
Dependent Claim
42 words
A filter as claimed in claim 1 wherein the protective plastic material extends beyond the central permeable core sheet on both sides thereof, thus making the filter system substantially wider than the central permeable core sheet without altering its substantially flat dimension.
Claim 8
Dependent Claim
17 words
A filter system as claimed in claim 1 wherein the adsorbent material is impregnated with ferric oxide.
Claim 9
Dependent Claim
58 words
An artificial anus drainage bag comprising component plastic films sealed together along their peripheral edges, the bag containing between the component plastic films a gas filter system as claimed in claim 1, the respective ends of the filter system extending through the peripheral edges which surround and are sealed to the protective plastic material of said filter system.
Claim 10
Dependent Claim
25 words
A drainage bag as claimed in claim 8 wherein the central permeable core sheet is composed of nonwoven fabric or of open-cell expanded plastic material.
Claim 11
Dependent Claim
17 words
A drainage bag as claimed in claim 9 wherein the open-cell expanded plastic material is expanded polyurethane.
Claim 12
Dependent Claim
15 words
A drainage bag as claimed in claim 9 wherein the adsorbent material is activated carbon.
Claim 13
Dependent Claim
15 words
A drainage bag as claimed in claim 9 wherein the adsorbent material is zinc ricinoleate.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |