US4477363A
Expired / Lapsed
US
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Free fatty alcohol and buffered alkali earth metal surfactant cakes for optimum performance
Assignee: Procter and Gamble Co
•
Filing: 1982-12-23
•
Granted: 1984-10-16
•
Expires: 2002-12-23
Abstract
Abstract A solid cake comprising 1% to 15% free fatty alcohol and 20% to 90% buffered alkali earth metal alkyl sulfate surfactant. Perfume, dye or salt, or any combination thereof are added. The surfactant and cakes made therefrom have pH's of from about 6 to about 10. The free fatty alcohol and buffered surfactant compositions and their cakes have improved longevity and improved stability. Preferred cakes are made with coconut free fatty alcohol and buffered magnesium alkyl sulfate.
Inventors
- 👤 Louis F. Wong
- 👤 Rosstain F. Sterling
- 👤 Thomas A. Borcher, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:53
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2003; C11D3/2006; C11D3/201; C11D3/2013; C11D1/00; C11D1/02; C11D1/12; C11D1/14; C11D1/146; C11D17/00; C11D17/0047; C11D17/0056; C11D17/04; C11D17/041; C11D3/50
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
92 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 40% to 90% of an alkali earth metal alkyl sulfate, 0% to 30% perfume, 0% to 12% of a dye, and 0% to 40% of a compatible water-soluble salt; said cake weighing from 10 gms to 120 gms and having a density of 0.8 to 1.5, said cake having a pH of 6 to 10, said cake containing at least 1.5% of at least one of said perfume or dye.
Claim 2
Dependent Claim
92 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 40% to 90% of an alkali earth metal alkyl sulfate, 0% to 30% perfume, 0% to 12% of a dye, and 0% to 40% of a compatible water-soluble salt; said cake weighing from 10 gms to 120 gms and having a density of 0.8 to 1.5, said cake having a pH of 6 to 10, said cake containing at least 1.5% of at least one of said perfume or dye.
Claim 3
Dependent Claim
18 words
The invention of claim 1 wherein said free fatty alcohol has carbon chain lengths of 8 to 18.
Claim 4
Dependent Claim
13 words
The invention of claim 2 wherein said chain length is 12 to 16.
Claim 5
Dependent Claim
16 words
The invention of claim 1 wherein said cake contains from 3% to 10% free fatty alcohol.
Claim 6
Dependent Claim
29 words
The invention of claim 4 wherein said alkali earth metal alkyl sulfate is selected from the group consisting of magnesium alkyl sulfate, calcium alkyl sulfate, and barium alkyl sulfate.
Claim 7
Dependent Claim
48 words
The invention of claim 5 wherein said cake comprises 40% to 70% of said alkyl sulfate, 10% to 20% perfume, 1.5% to 10% dye, and 5% to 18% water-soluble salt; said cake weighing from 20 gms to 100 gms and having a density of 1 to 1.3 gms/cc.
Claim 8
Dependent Claim
21 words
The invention of claim 6 wherein said alkyl sulfate contains a carbon chain length of from 8 to 22 carbon atoms.
Claim 9
Dependent Claim
16 words
The invention of claim 7 wherein alkyl sulfate chain length is 10 to 16 carbon atoms.
Claim 10
Dependent Claim
12 words
The invention of claim 8 wherein said pH is 7 to 9.5.
Claim 11
Dependent Claim
16 words
The invention of claim 9 wherein said cake has a moisture content of 0.1% to 10%.
Claim 12
Dependent Claim
13 words
The invention of claim 10 wherein the moisture content is 1% to 5%.
Claim 13
Dependent Claim
77 words
A substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 20% to 90% of a transition metal alkyl sulfate, 0% to 30% perfume, 0% to 40% of a compatible water-soluble salt, and 0% to 12% of a dye; said cake weighing from 10 gms to 120 gms and having a density of about 0.8 to about 1.5 wherein said cake contains at least 1.5% of at least one combination of perfume or dye.
Claim 14
Dependent Claim
77 words
A substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 20% to 90% of a transition metal alkyl sulfate, 0% to 30% perfume, 0% to 40% of a compatible water-soluble salt, and 0% to 12% of a dye; said cake weighing from 10 gms to 120 gms and having a density of about 0.8 to about 1.5 wherein said cake contains at least 1.5% of at least one combination of perfume or dye.
Claim 15
Dependent Claim
26 words
The invention of claim 12 wherein said transition metal alkyl sulfate is selected from the group consisting of iron, copper, zinc, silver, and cadmium alkyl sulfates.
Claim 16
Dependent Claim
38 words
The invention of claim 13, wherein said cake comprises 3% to 10% free fatty alcohol, 40% to 70% of said alkyl sulfate, 10% to 20% perfume, 1.5% to 10% dye and 5% to 18% of a water-soluble salt.
Claim 17
Dependent Claim
33 words
The invention of claim 4 wherein said alcohol has a C 8 to C 18 chain and wherein said alkyl sulfate contains a carbon chain length of from 8 to 22 carbon atoms.
Claim 18
Dependent Claim
28 words
The invention of claim 15 wherein said alcohol carbon chain is 12 to 16 carbon atoms, and wherein said alkyl chain length is 10 to 16 carbon atoms.
Claim 19
Dependent Claim
12 words
The invention of claim 16 wherein said pH is 7 to 9.5.
Claim 20
Dependent Claim
49 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid surfactant cake comprising from 1% to 15% free fatty alcohol, and 40% to 90% of an anionic surfactant selected from the group consisting of aluminum alkyl sulfate, tn alkyl sulfate, lead alkyl sulfate, and barium alkyl sulfate.
Claim 21
Dependent Claim
49 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid surfactant cake comprising from 1% to 15% free fatty alcohol, and 40% to 90% of an anionic surfactant selected from the group consisting of aluminum alkyl sulfate, tn alkyl sulfate, lead alkyl sulfate, and barium alkyl sulfate.
Claim 22
Dependent Claim
38 words
The invention of claim 18 wherein said cake comprises 3% to 10% free fatty alcohol, 40% to 70% of said alkyl sulfate, 10% to 20% perfume, 1.5% to 10% dye and 5% to 18% of a water-soluble salt.
Claim 23
Dependent Claim
33 words
The invention of claim 19 wherein said alcohol carbon atom chain is 8 to 18, and wherein said alkyl sulfate contains a alkyl carbon chain length of from 8 to 22 carbon atoms.
Claim 24
Dependent Claim
27 words
The invention of claim 20 wherein said alcohol chain is 12 to 16 carbon atoms, and wherein said alkyl chain length is 10 to 16 carbon atoms.
Claim 25
Dependent Claim
12 words
The invention of claim 21 wherein said pH is 7 to 9.5.
Claim 26
Dependent Claim
93 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 40% to 90% of an alkali earth metal alkyl sulfate, 0% to 30% perfume, 0% to 12% of a dye, and 0% to 40% of a compatible water-soluble salt; said cake weighing from 10 gms to 120 gms and having a density of 0.8 to 1.5, said cake having a pH of 6 to 10 wherein said cake contains at least 10% of a combination of perfume, dye and water-soluble salt.
Claim 27
Dependent Claim
93 words
In conjunction with a toilet tank dosing dispenser, a substantially stable solid cake comprising from 1% to 15% free fatty alcohol, from 40% to 90% of an alkali earth metal alkyl sulfate, 0% to 30% perfume, 0% to 12% of a dye, and 0% to 40% of a compatible water-soluble salt; said cake weighing from 10 gms to 120 gms and having a density of 0.8 to 1.5, said cake having a pH of 6 to 10 wherein said cake contains at least 10% of a combination of perfume, dye and water-soluble salt.
Claim 28
Dependent Claim
15 words
The invention of claim 23 wherein said cake contains at least 2% sodium alkyl sulfate.
Claim 29
Independent Claim
81 words
A method of making a stable and longevous solid alkali earth metal alkyl sulfate surfactant composition comprising reacting an alkali earth metal salt with an alkali metal alkyl sulfate salt in the presence of an effective amount of a buffer having a pKa of from 6 to 10; said alkali earth metal alkyl sulfate surfactant having a pH of from 6 to 10; and mixing said buffered surfactant with an effective amount of free fatty alcohol for optimum stability and longevity.
Claim 30
Independent Claim
81 words
A method of making a stable and longevous solid alkali earth metal alkyl sulfate surfactant composition comprising reacting an alkali earth metal salt with an alkali metal alkyl sulfate salt in the presence of an effective amount of a buffer having a pKa of from 6 to 10; said alkali earth metal alkyl sulfate surfactant having a pH of from 6 to 10; and mixing said buffered surfactant with an effective amount of free fatty alcohol for optimum stability and longevity.
Claim 31
Dependent Claim
40 words
The invention of claim 25 wherein said composition contains from 1% to 15% free fatty alcohol and from 20% to 90% said surfactant and wherein said pKa is from 7 to 9.5 and said pH is from 7 to 9.5.
Claim 32
Dependent Claim
28 words
The invention of claim 26 wherein said buffer is sodium carbonate used at a level of 0.5% to 3% by weight of the alkali earth metal alkyl sulfate.
Claim 33
Dependent Claim
30 words
The invention of claim 27 wherein said alkali earth metal sulfate is magnesium alkyl sulfate and said free fatty alcohol has a carbon atom chain length of 8 to 18.
Claim 34
Independent Claim
71 words
A method of making a stable solid alkali earth metal alkyl sulfate composition comprising reacting an alkali earth metal salt with an alkyl sulfuric acid and buffering the reaction product with an effective amount of a suitable buffer having a pKa of 6 to 10 to provide a product having a pH of from 6 to 10 and mixing said buffered reaction product with an effective amount of free fatty alcohol.
Claim 35
Independent Claim
71 words
A method of making a stable solid alkali earth metal alkyl sulfate composition comprising reacting an alkali earth metal salt with an alkyl sulfuric acid and buffering the reaction product with an effective amount of a suitable buffer having a pKa of 6 to 10 to provide a product having a pH of from 6 to 10 and mixing said buffered reaction product with an effective amount of free fatty alcohol.
Claim 36
Dependent Claim
40 words
The invention of claim 29 wherein said composition contains from 1% to 15% free fatty alcohol and from 20% to 90% said surfactant and wherein said pKa is from 7 to 9.5 and said pH is from 7 to 9.5.
Claim 37
Dependent Claim
31 words
The invention of claim 30 wherein said alkali earth metal alkyl sulfate is magnesium alkyl sulfate and said free fatty alcohol has a carbon atom chain length of 8 to 18.
Claim 38
Dependent Claim
19 words
The invention of claim 31 wherein said alcohol is coconut free fatty alcohol, and wherein said alkyl is lauryl.
Claim 39
Dependent Claim
20 words
The invention of claim 31 wherein said free fatty alcohol has a chain length of 10 to 16 carbon atoms.
Claim 40
Dependent Claim
11 words
The invention of claim 33 wherein said pH is about 9.5.
Claim 41
Dependent Claim
24 words
The invention of claim 34, wherein said stable solid free fatty alcohol/magnesium alkyl sulfate composition has a moisture content of from 0.1% to 10%.
Claim 42
Dependent Claim
13 words
The invention of claim 35 wherein said moisture content is 1% to 5%.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |