Patent US3755244A successfully refreshed from Google Patents.
US3755244A
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Polyolefin pigment dispersions
Assignee: Hercules LLC
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Filing: 1971-06-02
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Granted: 1973-08-28
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Expires: 1991-06-02
Abstract
Abstract Non-dusting, granular pigment concentrates which are intimate dispersions of pigment in a low molecular weight polyolefin are described. The pigment dispersions are produced by milling pigment, low molecular weight polyolefin and water to form an aqueous slurry and then solvent granulating the pigment dispersion in the slurry in the presence of a surfactant.
Inventors
- 👤 W Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:30
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/006; C09B67/0063; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/22; C08J3/226; C08J2323/00; C08J2323/02; C08J2423/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
17 words
heating the mixture so formed to a temperature ranging from about 30* C. to about 100* C.,
Claim 2
Dependent Claim
23 words
The process of claim 1 wherein the granulating step (b) is carried out at a temperature ranging from about 30* to about 100*C.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the polyolefin is polyethylene.
Claim 4
Dependent Claim
15 words
adjusting the pH of the mixture to at least about 6 or above, and then
Claim 5
Dependent Claim
18 words
continuing heating until granulation is complete and at least part of the solvent is removed by steam distillation.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the granulation step (b) comprises the sequential steps of
Claim 7
Dependent Claim
10 words
The process of claim 4 wherein the polyolefin is polyethylene.
Claim 8
Dependent Claim
11 words
The process of claim 3 wherein the pigment is carbon black.
Claim 9
Dependent Claim
11 words
The process of claim 3 wherein the pigment is phthalocyanine blue.
Claim 10
Dependent Claim
11 words
The process of claim 3 wherein the pigment is titanium dioxide.
Claim 11
Dependent Claim
11 words
The process of claim 5 wherein the pigment is carbon black.
References Cited (Backward Citations)
US3360497A
Cited
US3462390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |