US4269723A
Expired / Lapsed
US
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Process for making a lavatory cleansing block and use
Assignee: Jeyes Group Ltd
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Filing: 1979-03-20
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Granted: 1981-05-26
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Expires: 1999-03-20
Abstract
Abstract A process for the preparation of a lavatory cleansing tablet for immersion in the cistern of a lavatory comprises forming a free-flowing particulate mixture consisting essentially of: (a) from 5 to 90% by weight of a surface active component comprising one or more organic surface active agents, especially anionic or nonionic surface active agents; (b) from 0.5 to 75% by weight of one or more binders selected from clays and, preferably, water-soluble or water-dispersible gel-forming organic polymeric materials, especially cellulose derivatives; (c) from 0 to 20% of one or more dyestuffs; (d) from 0 to 35% by weight of a perfume component comprising a solid perfume or a liquid perfume optionally in admixture with a solid absorbent therefor; (e) a total of from 0 to 75% by weight of; (i) one or more inert water-soluble fillers; (ii) one or more water-softening or chelating agents; (iii) one or more solid water-soluble acids; (iv) one or more inert water-insoluble inorganic or polymeric organic fillers (in an amount of not more than 50% by weight of the mixture); (v) one or more tablet lubricants (in an amount of not more than 30% by weight of the mixture). (f) from 0 to 20% by weight of one or more germicides, fungicides, and/or chlorine release agents; and compressing the mixture to form a tablet. The invention also provides tablets produced by such a process which tablets suitably have a weight of from 20 to 150 grams, especially from 30 to 70 grams. In another aspect the invention provides a method of cleansing a lavatory which comprises immersing in the cistern of the lavatory a tablet produced in accordance with the invention.
Inventors
- 👤 Eric D. Barford
- 👤 Robin A. Gray
- 👤 Michael R. Saul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:11
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; C11D17/00; C11D17/0047; C11D17/0056; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225; C11D3/37; C11D1/00; C11D1/02; C11D1/04; C11D1/10; C11D1/12; C11D1/123; C11D1/14; C11D1/146; C11D1/18; C11D1/22; C11D1/29; C11D1/38; C11D1/52; C11D1/526
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
217 words
A process for the preparation of a lavatory cleansing tablet adapted for immersible use in the cistern of a lavatory which comprises forming a free-flowing particulate mixture consisting essentially of: (a) from 5 to 90% by weight of a surface active component comprising one or more organic surface active agents; (b) from 0.5 to 75% by weight of one or more binders which act as dissolution retarding agents selected from clays and water-soluble or water-dispersible gel-forming organic polymeric materials; (c) from 0 to 20% of one or more dyestuffs; (d) from 0 to 35% by weight of a perfume component comprising a solid perfume or a liquid perfume optionally in admixture with a solid absorbent therefor; (e) a total of from 0 to 75% by weight of: (i) one or more inert water-soluble fillers; (ii) one or more water-softening or chelating agents; (iii) one or more solid water-soluble acids; (iv) one or more inert water-insoluble inorganic or polymeric organic fillers (in an amount of not more than 50% by weight of the mixture); (v) one or more tablet lubricants (in an amount of not more than 30% by weight of the mixture); (f) from 0 to 20% by weight of one or more germicides, fungicides, and/or chlorine release agents; and compressing the mixture to form a tablet.
Claim 2
Dependent Claim
217 words
A process for the preparation of a lavatory cleansing tablet adapted for immersible use in the cistern of a lavatory which comprises forming a free-flowing particulate mixture consisting essentially of: (a) from 5 to 90% by weight of a surface active component comprising one or more organic surface active agents; (b) from 0.5 to 75% by weight of one or more binders which act as dissolution retarding agents selected from clays and water-soluble or water-dispersible gel-forming organic polymeric materials; (c) from 0 to 20% of one or more dyestuffs; (d) from 0 to 35% by weight of a perfume component comprising a solid perfume or a liquid perfume optionally in admixture with a solid absorbent therefor; (e) a total of from 0 to 75% by weight of: (i) one or more inert water-soluble fillers; (ii) one or more water-softening or chelating agents; (iii) one or more solid water-soluble acids; (iv) one or more inert water-insoluble inorganic or polymeric organic fillers (in an amount of not more than 50% by weight of the mixture); (v) one or more tablet lubricants (in an amount of not more than 30% by weight of the mixture); (f) from 0 to 20% by weight of one or more germicides, fungicides, and/or chlorine release agents; and compressing the mixture to form a tablet.
Claim 3
Dependent Claim
29 words
A process as claimed in claim 1 in which said particulate mixture contains a total of from 10 to 90% by weight of organic surface active agents and binders.
Claim 4
Dependent Claim
29 words
A process as claimed in claim 2 in which said particulate mixture contains a total of from 20 to 90% by weight of binder(s) and organic surface active agents.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 in which said mixture contains from 5 to 80% by weight of surface active agent(s).
Claim 6
Dependent Claim
22 words
A process as claimed in claim 4 in which said mixture contains from 5 to 60% by weight of surface active agent(s).
Claim 7
Dependent Claim
22 words
A process as claimed in claim 5 in which said mixture contains from 10 to 40% by weight of surface active agent(s).
Claim 8
Dependent Claim
20 words
A process as claimed in claim 1 in which the mixture contains from 1 to 70% by weight of binder(s).
Claim 9
Dependent Claim
20 words
A process as claimed in claim 7 in which the mixture contains from 5 to 60% by weight of binder(s).
Claim 10
Dependent Claim
32 words
A process as claimed in claim 1 in which the perfume is a microencapsulated perfume and is present in the particulate mixture in an amount of from 2 to 20% by weight.
Claim 11
Dependent Claim
45 words
A process as claimed in claim 1 in which the perfume is a liquid perfume and is present in the mixture in an amount of from 1 to 10% by weight, in admixture with from 1 to 15% by weight of a solid absorbent therefor.
Claim 12
Dependent Claim
20 words
A process as claimed in claim 1 in which the mixture contains from 1 to 15% by weight of dyestuff.
Claim 13
Dependent Claim
26 words
A process as claimed in claim 11 in which the dyestuff is present in the mixture in an amount of from 1 to 10% by weight.
Claim 14
Dependent Claim
20 words
A process as claimed in claim 1 in which the mixture contains from 1 to 15% by weight of germicide.
Claim 15
Dependent Claim
20 words
A process as claimed in claim 1 in which the mixture contains from 0 to 50% by weight of component(e).
Claim 16
Dependent Claim
20 words
A process as claimed in claim 14 in which the mixture contains from 20 to 50% by weight of component(e).
Claim 17
Dependent Claim
26 words
A process as claimed in claim 1 in which the mixture is compressed to form a tablet having a weight of from 20 to 150 grams.
Claim 18
Dependent Claim
26 words
A process as claimed in claim 16 in which the mixture is compressed to form a tablet having a weight of from 30 to 70 grams.
Claim 19
Dependent Claim
15 words
A process as claimed in claim 1 in which the binder is a cellulose ether.
Claim 20
Dependent Claim
34 words
A process as claimed in claim 18 in which the cellulose ether is methyl cellulose, ethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl hydroxyethyl cellulose or hydroxyethyl cellulose.
Claim 21
Dependent Claim
16 words
A process as claimed in claim 1 in which the binder is an alginate or caragheenate.
Claim 22
Dependent Claim
16 words
A process as claimed in claim 1 in which the binder is a wholly synthetic polymer.
Claim 23
Dependent Claim
43 words
A process as claimed in claim 21 in which the binder is a polyvinyl alcohol, water-soluble partially hydrolysed polyvinyl acetate, polyacrylonitrile, polyvinyl pyrolidones, water-soluble polymer of an ethylenically unsaturated carboxylic acid, or salt thereof, base-hydrolysed starch-polyacrylonitrile copolymer, ethylene oxide polymer or a carboxypolymethylene.
Claim 24
Dependent Claim
58 words
A process as claimed in claim 1 in which the organic surface active is an anionic surface active agent selected from alkali metal salts of alkyl substituted benzene sulphonic acids, alkali metal salts of long chain fatty sulphates, alkali metal ether sulphates derived from alcohols and alkyl phenols, alkali metal sulphosuccinates, alkali metal sarcosinates and alkali metal taurides.
Claim 25
Dependent Claim
51 words
A process as claimed in claim 1 in which the organic surface active agent is a nonionic surface active agent selected from alkylene oxide condensates of fatty acids, fatty alcohols or alkyl substituted phenols; ethylene oxide/propylene oxide block copolymers; fatty acid mono- and di- alkanolamides and ethoxylates thereof, and sucrose surfactants.
Claim 26
Dependent Claim
26 words
A method of cleansing a lavatory or urinal which comprises immersing in the cistern thereof a tablet obtained by a process as claimed in claim 1.
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |