US3632369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer pigmentation
Assignee: Coaden Oil & Chemical Co
•
Filing: 1969-12-11
•
Granted: 1972-01-04
•
Expires: 1989-12-11
Abstract
Abstract Particles of polyethylene, polypropylene, polyacrylic lower alkyl esters, and polymethacrylic lower alkyl esters are pigmented by progressively mixing the dry particles with dry pigment in a high-speed mixer having a blade tip speed exceeding about 200 inches per second for a short period of a few minutes or less, whereby all of the pigment becomes firmly adhered to the surfaces of the polymer particles.
Inventors
- 👤 Granville J Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; B; B01; B01F; B01F35/00; B01F35/20; B01F35/22; B01F35/221; B01F35/2214; B01F35/22142; B01F35/221421; B29; B29B; B29B7/00; B29B7/002; B29B7/005; B29B7/80; B29B7/88; B29B9/00; B29B9/16; C08J3/00; C08J3/20; C08J3/203; C08L; C08L51/00; C08L51/04; C08L55/00; C08L55/02; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; B29K2033/00; B29K2033/04; B29K2033/08; B29K2033/12; B29K2105/00; B29K2105/0005; B29K2105/0032; B29K2105/25; B29K2105/251; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded polyethylene pellets.
Claim 2
Dependent Claim
15 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded polypropylene pellets.
Claim 3
Dependent Claim
32 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded polymerized lower alkyl ester of acrylic acid pellets, the lower alkyl ester group having one to four carbon atoms.
Claim 4
Dependent Claim
16 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded poly methylacrylate pellets.
Claim 5
Dependent Claim
30 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded polymerized lower alkyl ester of methacrylic acid pellets, the lower alkyl having one to four carbon atoms.
Claim 6
Dependent Claim
16 words
Pigmented polymer particles as defined in claim 1 wherein the particles are rounded polymethyl methacrylate pellets.
Claim 7
Dependent Claim
21 words
Pigmented polymer particles as defined in claim 1 wherein the pigment is a dry powdered pigment substance insoluble in said polymer.
Claim 8
Dependent Claim
14 words
Pigmented polymer particles as defined in claim 1 wherein the pigment is carbon black.
Claim 9
Dependent Claim
14 words
Pigmented polymer particles as defined in claim 1 wherein the pigment is titanium dioxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |