Patent US4559384A successfully refreshed from Google Patents.
US4559384A
Expired / Lapsed
US
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Process for preventing agglomeration of powders by using triethylenediamine polymers
Assignee: Tosoh Corp
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Filing: 1984-12-19
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Granted: 1985-12-17
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Expires: 2004-12-19
Abstract
Abstract A process for preventing the agglomeration of agglomerative powder, such as TEDA monomer piperazine, sodium chloride and ammonium chloride, comprising adding TEDA polymer to the agglomerative powder or adding TEDA to a solution from which the powdery material is crystallized.
Inventors
- 👤 Akihiko Nomura
- 👤 Masahiko Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/26; B; B01; B01J; B01J2/00; B01J2/30; C01C; C01C1/00; C01C1/16; C01C1/164
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
A process for preventing agglomeration of a powders which comprises employing triethylenediamine polymer as an agglomeration preventing agent.
Claim 2
Dependent Claim
18 words
A process for preventing agglomeration of a powders which comprises employing triethylenediamine polymer as an agglomeration preventing agent.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein triethylenediamine polymer is added in an amount ranging from 0.001 to 1.0 part by weight to 100 parts by weight of the powder.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein the triethylenediamine polymer is added in an amount ranging from 0.001 to 0.1 part by weight.
Claim 5
Dependent Claim
22 words
The process of claim 2 wherein the triethylenediamine polymer is added in an amount ranging from 0.005 to 0.02 part by weight.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein triethylenediamine polymer has an average particle diameter ranging from 0.1μ to 50μ.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein triethylenediamine polymer has an average particle diameter ranging from 0.1μ to 10μ.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein the average molecular weight of triethylenediamine polymer is in the range of from 220 to 60,000.
Claim 9
Dependent Claim
38 words
The process of claim 1 wherein the average molecular weight of triethylenediamine polymer is in the range of from 220 to 3,000 and added to a solution form from which the powder is crystallized in a crystallizing procedure.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the powder is triethylenediamine monomer, piperazine, sodium chloride or ammonium chloride.
References Cited (Backward Citations)
US3112320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |