Patent US4094807A successfully refreshed from Google Patents.
US4094807A
Expired / Lapsed
US
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Preparation of detergent bars containing zinc oxide
Assignee: Lever Brothers Co
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Filing: 1977-06-06
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Granted: 1978-06-13
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Expires: 1997-06-06
Abstract
Abstract The invention relates to a method of incorporating zinc oxide into a detergent bar. In order to avoid grittiness in the bar the zinc oxide is slurried in an aqueous or organic liquid before it is added to the detergent material. Preferably the zinc oxide used has a particle size distribution such that not more than about 5% by weight of the oxide is held on a 10 micron sieve and not more than about 3% by weight is held on a 30 micron sieve. The invention is particularly applicable to the production of superfatted bars.
Inventors
- 👤 Peter Franklin Humphreys
- 👤 Edwin Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:14
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/04; C11D9/48; C11D9/06; C11D9/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
A method of preparing detergent bars containing from about 0.1% to about 2% by weight of zinc oxide wherein i. zinc oxide is formed into a slurry containing from about 10 % to about 80% by weight of said oxide with a liquid medium, ii. the slurry is added to and mixed with a detergent material at the mixing stage, and iii. the detergent material is milled, plodded and stamped to form bars.
Claim 2
Independent Claim
73 words
A method of preparing detergent bars containing from about 0.1% to about 2% by weight of zinc oxide wherein i. zinc oxide is formed into a slurry containing from about 10 % to about 80% by weight of said oxide with a liquid medium, ii. the slurry is added to and mixed with a detergent material at the mixing stage, and iii. the detergent material is milled, plodded and stamped to form bars.
Claim 3
Dependent Claim
50 words
A method of according to claim 1, wherein the zinc oxide has a particle size distribution such that not more than about 5% by weight of the oxide is held on a 10 micron sieve and not more than about 3% by weight is held on a 30 micron sieve.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein the liquid medium is aqueous.
Claim 5
Dependent Claim
19 words
A method according to claim 3, wherein the medium contains an amount of surfactant effective to stabilise the slurry.
Claim 6
Dependent Claim
26 words
A method according to claim 4, wherein the surfactant is present in an amount of from about 0.1% to about 5% by weight of the slurry.
Claim 7
Dependent Claim
12 words
A method according to claim 1, wherein the liquid medium is organic.
Claim 8
Dependent Claim
13 words
A method according to claim 6, wherein the organic liquid is a perfume.
Claim 9
Dependent Claim
28 words
A method according to claim 1 wherein the detergent material contains at least about 1% be weight of free fatty acid containing from 8 to 22 carbon atoms.
Claim 10
Dependent Claim
21 words
A method according to claim 8, wherein the detergent material contains up to about 25% by weight of free fatty acid.
Claim 11
Dependent Claim
21 words
A method according to claim 9, wherein the detergent material contains up to about 15% by weight of free fatty acid.
Claim 12
Dependent Claim
20 words
A method according to claim 1 wherein the milling step is performed within 15 minutes of completing the mixing step.
Claim 13
Dependent Claim
17 words
A method according to claim 1 wherein the slurry has a viscosity not above about 200 poises.
Claim 14
Dependent Claim
16 words
A method according to claim 12, wherein the slurry has a viscosity not above 25 poises.
Claim 15
Dependent Claim
19 words
A method according to claim 1, wherein the slurry contains from about 20% to about 70% of zinc oxide.
Claim 16
Dependent Claim
20 words
The method according to claim 1, wherein the detergent material has a temperature below 40° C at the mixing stage.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |