US4059538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing granulated detergent formulations
Assignee: Lever Brothers Co
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Filing: 1976-03-01
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Granted: 1977-11-22
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Expires: 1996-03-01
Abstract
Abstract Detergent formulations are granulated commercially by spray drying a slurry of the formulation. There is now proposed a method in which the components in powder form are granulated with a binder in a substantially horizontal annular rotating bed. The binder may be released by the action of the rotating bed.
Inventors
- 👤 Robin John Green
- 👤 Richard Shaw Johnson
- 👤 John Kenneth Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:47
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/10; B01J2/28; C; C11; C11D; C11D11/00; C11D11/0082; C11D17/00; C11D17/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
A method of granulating a detergent formulation containing from about 2 to about 40% by weight of detergent active material, and from about 5 to about 60% by weight of detergency builder material to form granules in the range from about 0.3 mm to about 3.00 mm from detergent components in powder form, wherein the detergent components are formed into a substantially horizontal annular rotation bed within an apparatus comprising a roughened rotating table concentrically displaced within a smooth walled cylinder, and contacted with a compatible liquid binder that is released from a component during rotation of the formed bed.
Claim 2
Independent Claim
100 words
A method of granulating a detergent formulation containing from about 2 to about 40% by weight of detergent active material, and from about 5 to about 60% by weight of detergency builder material to form granules in the range from about 0.3 mm to about 3.00 mm from detergent components in powder form, wherein the detergent components are formed into a substantially horizontal annular rotation bed within an apparatus comprising a roughened rotating table concentrically displaced within a smooth walled cylinder, and contacted with a compatible liquid binder that is released from a component during rotation of the formed bed.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein the binder is released by decomposition of a material due to heat produced in the rotating bed.
Claim 4
Dependent Claim
17 words
A method according to claim 2, wherein the binder is water released by decomposition of a hydrate.
Claim 5
Dependent Claim
19 words
A method according to claim 1, wherein the binder is formed into liquid by melting in the rotating bed.
Claim 6
Dependent Claim
18 words
A method according to claim 1, wherein the binder is released in the rotating bed by mechanical forces.
Claim 7
Dependent Claim
34 words
A method according to claim 1, wherein the detergent formulation contains from about 5 to about 30% of a detergent active material; and from about 5 to about 30% of a detergency builder material.
Claim 8
Dependent Claim
19 words
A method according to claim 1, wherein components of the formulation are granulated in sequence to form layered granules.
Claim 9
Dependent Claim
25 words
A method according to claim 1, wherein the detergent formulation contains from about 5 to about 30% by weight of an active oxygen releasing material.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |