US4344766A
Expired / Lapsed
US
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Process for the manufacture of preparations with a low dust content
Assignee: Bayer AG
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Filing: 1981-04-20
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Granted: 1982-08-17
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Expires: 2001-04-20
Abstract
Abstract Pulverulent preparations with a low dust content, in particular dyestuff powders, are obtained when the customary dustproofing agents are not added before the drying process and also are not sprayed directly onto the product to be dustproofed, but are allowed to act on the pulverulent product in the form of an aerosol. The average particle size of the aerosol is less than 10μ.
Inventors
- 👤 Jurgen Lahrs
- 👤 Klaus Schubert
- 👤 Claus Gosling
- 👤 Dorde Jovcic
- 👤 Harald Gleinig
- 👤 Reiner Skerhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:37
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
In a process for the manufacture of pulverulent or granular preparations having a low dust content, by spraying the preparation with a dustproofing agent, the improvement comprising: adjusting the dustproofing agent spray to an average particle size of less than 10 microns and applying said agent in an amount of 0.01 to 4%.
Claim 2
Dependent Claim
53 words
In a process for the manufacture of pulverulent or granular preparations having a low dust content, by spraying the preparation with a dustproofing agent, the improvement comprising: adjusting the dustproofing agent spray to an average particle size of less than 10 microns and applying said agent in an amount of 0.01 to 4%.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said agent is applied in an amount of 0.1 to 1%.
Claim 4
Dependent Claim
18 words
The process of claim 1 or 2 wherein the preparations to be processed are dyestuff powders or granules.
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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |