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Patent US4043931A successfully refreshed from Google Patents.
US4043931A
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US
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Lavatory cleansing block
Assignee: Jeyes Group Ltd
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Filing: 1974-02-19
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Granted: 1977-08-23
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Expires: 1994-02-19
Abstract
Abstract A lavatory cleansing block comprises a solid carrier base which is a mixture of two or more non-ionic surface active agents, one of which is relatively insoluble in water and the other of which is relatively soluble in water and preferably also contains one or more of (i) perfuming agents, (ii) coloring constituents, (iii) germicides, (iv) builders or fillers and (v) water-softening agents.
Inventors
- 👤 Daniel John Jeffrey
- 👤 Keith Charles Gingell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:46
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0047; C11D17/0056; C11D1/00; C11D1/38; C11D1/52; C11D1/523; C11D1/66; C11D1/72; C11D1/835
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A lavatory cleansing block comprising at least 35% of a solid carrier base which consists essentially of a mixture of at least two non-ionic surface active agents, one of which has a water solubility of 0.01 to 0.5% at 20° C. and is a mono- or dialkanolamide of a long chain fatty acid of the formula: ##STR2## in which R is a long chain aliphatic group of from 8-24 C atoms, R 1 is a lower alkylene group and R 2 is a hydrogen atom or R'OH and the other of which has a water solubility of 1-100 at 20° C., the degree of release of components from the block being to a large extent controlled by the relative properties of relatively soluble and relatively insoluble non-ionic surface active components.
Claim 2
Dependent Claim
130 words
A lavatory cleansing block comprising at least 35% of a solid carrier base which consists essentially of a mixture of at least two non-ionic surface active agents, one of which has a water solubility of 0.01 to 0.5% at 20° C. and is a mono- or dialkanolamide of a long chain fatty acid of the formula: ##STR2## in which R is a long chain aliphatic group of from 8-24 C atoms, R 1 is a lower alkylene group and R 2 is a hydrogen atom or R'OH and the other of which has a water solubility of 1-100 at 20° C., the degree of release of components from the block being to a large extent controlled by the relative properties of relatively soluble and relatively insoluble non-ionic surface active components.
Claim 3
Dependent Claim
37 words
A block as claimed in claim 1 in which the surface active agent of higher water solubility is a polyalkoxylated fatty alcohol containing more than 6 ethyleneoxy units per molecule or an ethyleneoxy or propyleneoxy block copolymer.
Claim 4
Dependent Claim
48 words
A block as claimed in claim 1 also containing at least one of (i) up to 30% by weight of perfuming agents, (ii) up to 20% by weight of colouring constituents, (iii) up to 25% by weight of germicides and (iv) up to 60% by weight of fillers.
Claim 5
Dependent Claim
16 words
A block as claimed in claim 1 having a weight of from 20 to 150 grams.
Claim 6
Dependent Claim
16 words
A block as claimed in claim 1 having a weight of from 30 to 70 grams.
Claim 7
Dependent Claim
15 words
A block as claimed in claim 1 contained in a protective envelope of polyvinyl alcohol.
Claim 8
Independent Claim
141 words
A method of cleaning a lavatory which comprises inserting into the water cistern thereof a lavatory cleaning block comprising at least 35% of a solid carrier base which consists essentially of a mixture of at least two nonionic surface active agents, one of which has a water solubility of 0.01 to 0.5% at 20° C. and is a mono- or dialkanolamide of a long chain fatty acid of the formula: ##STR3## in which R is a long chain aliphatic group of from 8-24 C atoms, R 1 is a lower alkylene group and R 2 is a hydrogen atom of R'OH and the other of which has a water solubility of 1-100 at 20° C., the degree of release of components from the block being to a large extent controlled by the relatively soluble and relatively insoluble non-ionic surface active components.
Claim 9
Independent Claim
141 words
A method of cleaning a lavatory which comprises inserting into the water cistern thereof a lavatory cleaning block comprising at least 35% of a solid carrier base which consists essentially of a mixture of at least two nonionic surface active agents, one of which has a water solubility of 0.01 to 0.5% at 20° C. and is a mono- or dialkanolamide of a long chain fatty acid of the formula: ##STR3## in which R is a long chain aliphatic group of from 8-24 C atoms, R 1 is a lower alkylene group and R 2 is a hydrogen atom of R'OH and the other of which has a water solubility of 1-100 at 20° C., the degree of release of components from the block being to a large extent controlled by the relatively soluble and relatively insoluble non-ionic surface active components.
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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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |