US4620999A
Expired / Lapsed
US
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Disposable bags
Assignee: Imperial Chemical Industries Ltd
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Filing: 1984-11-05
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Granted: 1986-11-04
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Expires: 2004-11-05
Abstract
Abstract Degradation of body-waste bags to assist disposal thereof in sewage systems is facilitated by addition of a base to raise the pH of the human fecal waste bag contents to at least about 12. Inter alia, there is provided a package of at least one bag and sufficient base, preferably in prepacked quantities, to treat all the bags in the package.
Inventors
- 👤 Paul A. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A61; A61F; A61F5/00; A61F5/44; A61F5/445; A61G; A61G9/00; A61L; A61L28/00; A61L28/0007; A61L28/0015; B32B27/28; C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/14; C08J11/16; A61F2005/4402; B32B2307/00; B32B2307/70; B32B2307/716; B32B2307/7166; B32B2439/00; B32B2555/00; C08J2367/00; C08J2367/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986; Y10T428/8305
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A package including at least one body-waste bag comprising a 3-hydroxybutyrate polymer and requisite amount of a basic material to modify the pH of the contents of all the body-waste bags in the package, at the time the bags are half filled with human faeces and/or urine, to a value of at least about 12.
Claim 2
Dependent Claim
55 words
A package including at least one body-waste bag comprising a 3-hydroxybutyrate polymer and requisite amount of a basic material to modify the pH of the contents of all the body-waste bags in the package, at the time the bags are half filled with human faeces and/or urine, to a value of at least about 12.
Claim 3
Dependent Claim
28 words
A package according to claim 1 wherein the basic material is in a number of prepacked amounts at least equal to the number of bags in the package.
Claim 4
Dependent Claim
33 words
A package according to claim 2 wherein the basic material is prepacked in containers formed from a water-soluble polymer, each container containing the amount of base required to be added to one bag.
Claim 5
Dependent Claim
19 words
A package according to claim 1 wherein the basic material is selected from sodium hydroxide and sodium carbonate monohydrate.
Claim 6
Dependent Claim
10 words
A package according to claim 1 also containing a surfactant.
Claim 7
Dependent Claim
49 words
A package according to claim 1 wherein each bag is fabricated from a film of a water-soluble polymer coated or laminated, at least on one surface, with a layer of a 3-hydroxybutyrate polymer, each bag having a 3-hydroxybutyrate polymer layer at least on the interior surface of the bag.
Claim 8
Dependent Claim
14 words
A package according to claim 1 wherein the 3-hydroxybutyrate polymer is a 3-hydroxybutyrate/3-hydroxyvalerate copolymer.
Claim 9
Dependent Claim
15 words
A package according to claim 1 wherein the 3-hydroxybutyrate polymer contains an aryl sulphonamide plasticiser.
Claim 10
Dependent Claim
72 words
A package including at least one body-waste bag comprising a 3-hydroxybutyrate polymer and a basic material selected from sodium hydroxide and sodium carbonate monohydrate, the quantity of base in the package being at least 0.2 xn of sodium hydroxide or at least 5 xn g of sodium carbonate monohydrate, where n is the number of said body-waste bags in the package and each body-waste bag has a total capacity of 100 ×ml.
Claim 11
Dependent Claim
72 words
A package including at least one body-waste bag comprising a 3-hydroxybutyrate polymer and a basic material selected from sodium hydroxide and sodium carbonate monohydrate, the quantity of base in the package being at least 0.2 xn of sodium hydroxide or at least 5 xn g of sodium carbonate monohydrate, where n is the number of said body-waste bags in the package and each body-waste bag has a total capacity of 100 ×ml.
Claim 12
Independent Claim
50 words
A method of disposal of a body-waste bag comprising a 3-hydroxybutyrate polymer and containing human faeces and/or urine including the steps of modifying the pH of the contents of the bag to a pH of at least about 12, and thereafter introducing said bag and contents into a sewage system.
Claim 13
Independent Claim
50 words
A method of disposal of a body-waste bag comprising a 3-hydroxybutyrate polymer and containing human faeces and/or urine including the steps of modifying the pH of the contents of the bag to a pH of at least about 12, and thereafter introducing said bag and contents into a sewage system.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |