Patent US4910038A successfully refreshed from Google Patents.
Patent US4741854A successfully refreshed from Google Patents.
US4741854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent toilet soap of light color
Assignee: Lever Brothers Co
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Filing: 1986-11-04
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Granted: 1988-05-03
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Expires: 2006-11-04
Abstract
Abstract The invention provides a method and composition for substantially reducing color in transparent soap bars. Color reduction is achieved by combining in critical ratio a sulphur and a hydride type reducing agent such as sodium metabisulfite with sodium borohydride.
Inventors
- 👤 Jerry J. Krupa
- 👤 Michael I. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:55
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/0095; C11D3/00; C11D3/0005; C11D3/0042
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
A transparent toilet bar comprising: (i) from 1% to 99% by weight of a C 12 -C 22 carbon atom fatty acid salt; (ii) from 0.03 to less than 0.2 wt.% of a first reducing agent selected from the group consisting of the salts of bisulfite, hydrosulfite, metabisulfite, sulfite and mixtures thereof; and (iii) from 0.0001 to less than 0.2 wt.% of a second reducing agent selected from the group consisting of sodium hydride, calcium hydride, lithium hydride, sodium aluminum hydride, sodium borohydride, sodium amide, diborane, alkyl and alkoxy aluminum hydrides, alkyl and alkoxy borohydrides, alkyl and alkoxy sodium aluminum hydrides, diimide and mixtures thereof.
Claim 2
Dependent Claim
105 words
A transparent toilet bar comprising: (i) from 1% to 99% by weight of a C 12 -C 22 carbon atom fatty acid salt; (ii) from 0.03 to less than 0.2 wt.% of a first reducing agent selected from the group consisting of the salts of bisulfite, hydrosulfite, metabisulfite, sulfite and mixtures thereof; and (iii) from 0.0001 to less than 0.2 wt.% of a second reducing agent selected from the group consisting of sodium hydride, calcium hydride, lithium hydride, sodium aluminum hydride, sodium borohydride, sodium amide, diborane, alkyl and alkoxy aluminum hydrides, alkyl and alkoxy borohydrides, alkyl and alkoxy sodium aluminum hydrides, diimide and mixtures thereof.
Claim 3
Dependent Claim
21 words
A toilet bar according to claim 1 wherein the amount of the first reducing agent ranges from 0.03 to 0.1 wt.%.
Claim 4
Dependent Claim
21 words
A toilet bar according to claim 1 wherein the amount of the first reducing agent ranges from 0.03 to 0.06 wt.%.
Claim 5
Dependent Claim
21 words
A toilet bar according to claim 1 wherein the amount of the second reducing agent ranges from 0.001 to 0.1 wt.%.
Claim 6
Dependent Claim
21 words
A toilet bar according to claim 1 wherein the amount of the second reducing agent ranges from 0.001 to 0.002 wt.%.
Claim 7
Dependent Claim
15 words
A toilet bar according to claim 1 wherein said first reducing agent is sodium metabisulfite.
Claim 8
Dependent Claim
15 words
A toilet bar according to claim 1 wherein said second reducing agent is sodium borohydride.
Claim 9
Dependent Claim
15 words
A toilet bar according to claim 1 having a combination of metabisulfite and borohydride salts.
Claim 10
Independent Claim
114 words
A method of reducing color in transparent toilet bars comprising combining with from 1% to about 99.9% of a C 6 -C 22 alkyl fatty acid salt, a reducing agent system comprising: (i) from 0.03 to less than 0.2 wt.% of a first reducing agent selected from the group consisting of the salts of bisulfite, hydrosulfite, metabisulfite, sulfite and mixtures thereof; and (ii) from 0.0001 to less than 0.2 wt.% of a second reducing agent selected from the group consisting of sodium hydride, calcium hydride, lithium hydride, sodium aluminum hydride, sodium borohydride, sodium amide, diborane, alkyl and alkoxy aluminum hydrides, alkyl and alkoxy borohydrides, alkyl and alkoxy sodium aluminum hydrides, diimide and mixtures thereof.
Claim 11
Independent Claim
114 words
A method of reducing color in transparent toilet bars comprising combining with from 1% to about 99.9% of a C 6 -C 22 alkyl fatty acid salt, a reducing agent system comprising: (i) from 0.03 to less than 0.2 wt.% of a first reducing agent selected from the group consisting of the salts of bisulfite, hydrosulfite, metabisulfite, sulfite and mixtures thereof; and (ii) from 0.0001 to less than 0.2 wt.% of a second reducing agent selected from the group consisting of sodium hydride, calcium hydride, lithium hydride, sodium aluminum hydride, sodium borohydride, sodium amide, diborane, alkyl and alkoxy aluminum hydrides, alkyl and alkoxy borohydrides, alkyl and alkoxy sodium aluminum hydrides, diimide and mixtures thereof.
Claim 12
Dependent Claim
20 words
A method according to claim 9 wherein the amount of the first reducing agent ranges from 0.03 to 0.1 wt.%.
Claim 13
Dependent Claim
20 words
A method according to claim 9 wherein the amount of the first reducing agent ranges from 0.03 to 0.06 wt.%.
Claim 14
Dependent Claim
20 words
A method according to claim 9 wherein the amount of the second reducing agent ranges from 0.001 to 0.1 wt.%.
Claim 15
Dependent Claim
20 words
A method according to claim 9 wherein the amount of the second reducing agent ranges from 0.001 to 0.002 wt.%.
Claim 16
Dependent Claim
14 words
A method according to claim 9 wherein said first reducing agent is sodium metabisulfite.
Claim 17
Dependent Claim
14 words
A method according to claim 1 wherein the second reducing agent is sodium borohydride.
Claim 18
Dependent Claim
14 words
A method according to claim 9 having a combination of metabisulfite and borohydride salts.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |