US3940341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular detergent compositions
Assignee: Colgate Palmolive Co
•
Filing: 1973-03-22
•
Granted: 1976-02-24
•
Expires: 1993-03-22
Abstract
Abstract Spray dried granular compositions containing sodium sulfite.
Inventors
- 👤 Frederick William Gray
- 👤 Virgil John Richter
- 👤 Andrew Henry Limekiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:44
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/046; C11D11/00; C11D11/02; C11D17/00; C11D17/06; C11D3/0005; C11D3/0042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
Process for the production of hollow granules of detergent compositions containing sulfite which retains its content on storage under heated conditions which comprises forming an aqueous slurry containing an organic detergent and alkali metal sulfite, wherein, by weight based on the total non-volatile constituents of said slurry, the amount of detergent is from about 5% to about 40% and the amount of sulfite is from about 3% to about 70%, said slurry being at an elevated temperature of at least 90°F, agitating said slurry, spraying said slurry into a hot evaporative atmosphere of about 300°F to about 900°F to form air-containing hollow granules of the detergent composition containing at least 3% of sulfite.
Claim 2
Dependent Claim
113 words
Process for the production of hollow granules of detergent compositions containing sulfite which retains its content on storage under heated conditions which comprises forming an aqueous slurry containing an organic detergent and alkali metal sulfite, wherein, by weight based on the total non-volatile constituents of said slurry, the amount of detergent is from about 5% to about 40% and the amount of sulfite is from about 3% to about 70%, said slurry being at an elevated temperature of at least 90°F, agitating said slurry, spraying said slurry into a hot evaporative atmosphere of about 300°F to about 900°F to form air-containing hollow granules of the detergent composition containing at least 3% of sulfite.
Claim 3
Dependent Claim
12 words
Process as in claim 1 in which the sulfite is sodium sulfite.
Claim 4
Dependent Claim
30 words
Process as in claim 2 in which the spraying is through a nozzle which is positioned in a spray-drying zone and said evaporative atmosphere is air supplied to said zone.
Claim 5
Dependent Claim
39 words
Process as in claim 3 in which said slurry is agitated while at a temperature of at least about 120°F in air forming an air-containing slurry which is forced under a pressure in excess of 100 psig to nozzle.
Claim 6
Dependent Claim
18 words
Process as in claim 4 in which said evaporative atmosphere leaving said zone has a temperature above 180°F.
Claim 7
Dependent Claim
32 words
Process as in claim 1 in which said proportion of sulfite is within the range of about 5 to 40% and said organic detergent is largely an anionic sulfonate or sulfate detergent.
Claim 8
Dependent Claim
23 words
Process as in claim 6 in which said slurry contains about 5 to 35% sodium silicate, based on non-volatile content of the slurry.
Claim 9
Dependent Claim
14 words
Spray dried hollow granules of detergent composition produced by the process of claim 1.
Claim 10
Dependent Claim
33 words
Granules as in claim 8, said granules being vesiculated structures having generally rounded smooth surfaces, the bulk density of the mass of granules being in the range of about 0.3 to 0.6 g/cc.
Claim 11
Dependent Claim
43 words
Granules as in claim 9 containing about 3 to 70% sodium sulfite, about 10 to 50% alkaline builder salt including about 5 to 35% sodium silicate and about 5 to 40% organic detergent which is a sulfate or sulfonate salt or mixture thereof.
Claim 12
Dependent Claim
8 words
Granules as in claim 10 containing nonionic detergent.
Claim 13
Dependent Claim
29 words
Granules as in claim 9 containing a detergent builder salt, which is a sodium salt of a water-soluble phosphate, phosphonate, carboxylic acid salt, silicate, or carbonate or mixture thereof.
References Cited (Backward Citations)
US3741901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |