Patent US4397777A successfully refreshed from Google Patents.
US4397777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy duty laundry detergent
Assignee: Colgate Palmolive Co
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Filing: 1980-07-18
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Granted: 1983-08-09
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Expires: 2000-07-18
Abstract
Abstract This invention relates to heavy duty laundry detergent compositions comprising a water-soluble mixture of paraffin sulfonate detergent, olefin sulfonate detergent and sodium silicate plus a water-insoluble molecular sieve or colloidal silica.
Inventors
- 👤 Joseph A. Yurko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:47
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/37; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C11D1/12; C11D1/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
A heavy duty particulate laundry detergent composition comprising in weight percentages, 12% paraffin sulfonate wherein the paraffin alkyl group is from 14 to 20 carbons with an average of 15 carbons, 6% higher olefin sulfonate produced by sulfonating an alpha-olefin of 15 to 20 carbons with about one equivalent of diluted sulfur trioxide, neutralizing with excess sodium hydroxide and heating the alkaline mixture above 150° C. to open the sultone rings in the mixture, 25% polysilicate of the formula Na 2 SiO 3 wherein the ratio Na 2 O to SiO 2 is 1 to 2.5, 10% 4 A zeolite molecular sieve containing 2% moisture and having a mean particle diameter of 8.3 microns, 0.5% sodium carboxymethyl cellulose, 1% optical brightener, 0.5% perfume, 26.7% anhydrous sodium sulfate, 15% moisture and 3.3% other materials associated with paraffin and olefin sulfonates.
Claim 2
Dependent Claim
139 words
A heavy duty particulate laundry detergent composition comprising in weight percentages, 12% paraffin sulfonate wherein the paraffin alkyl group is from 14 to 20 carbons with an average of 15 carbons, 6% higher olefin sulfonate produced by sulfonating an alpha-olefin of 15 to 20 carbons with about one equivalent of diluted sulfur trioxide, neutralizing with excess sodium hydroxide and heating the alkaline mixture above 150° C. to open the sultone rings in the mixture, 25% polysilicate of the formula Na 2 SiO 3 wherein the ratio Na 2 O to SiO 2 is 1 to 2.5, 10% 4 A zeolite molecular sieve containing 2% moisture and having a mean particle diameter of 8.3 microns, 0.5% sodium carboxymethyl cellulose, 1% optical brightener, 0.5% perfume, 26.7% anhydrous sodium sulfate, 15% moisture and 3.3% other materials associated with paraffin and olefin sulfonates.
Claim 3
Dependent Claim
10 words
A composition according to claim 1 comprising milled agglomerate particles.
Claim 4
Dependent Claim
17 words
A composition according to claim 2 comprising particles of a size from 12 mesh to 200 mesh.
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |