Patent US4128435A successfully refreshed from Google Patents.
US4128435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lustrous pigments for pigmenting casein plastics
Assignee: Merck Patent GmbH
•
Filing: 1977-06-24
•
Granted: 1978-12-05
•
Expires: 1997-06-24
Abstract
Abstract Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 μm., a thickness of about 0.1 to 0.7 μm. and a ratio of diameter to thickness of about 10 to 200.
Inventors
- 👤 Wilhelm Baumer
- 👤 Horst Bernhard
- 👤 Reiner Esselborn
- 👤 Jorg Ohngemach
- 👤 Otto Stahlecker
- 👤 Fritz Zureda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:33
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0021; C01; C01P; C01P2004/00; C01P2004/54; C01P2004/60; C01P2004/61; C09C2200/00; C09C2200/10; C09C2200/102; C09C2200/30; C09C2200/301; C09C2200/308
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A pigmented casein plastic molding composition for molding by compression and heating into articles of manufacture substantially free from cracks and pores visible at 1 : 100 magnification, wherein the pigment is a minor luster-imparting quantity of lustrous pigments of coated mica platelets, wherein at least 75% of the pigment particles possess an average main diameter of below 10 μm. and not lower than about 2μm., a thickness of about 0.1 to 0.7μm. and a ratio of diameter to thickness of about 10 to 1 to 200 to 1.
Claim 2
Dependent Claim
89 words
A pigmented casein plastic molding composition for molding by compression and heating into articles of manufacture substantially free from cracks and pores visible at 1 : 100 magnification, wherein the pigment is a minor luster-imparting quantity of lustrous pigments of coated mica platelets, wherein at least 75% of the pigment particles possess an average main diameter of below 10 μm. and not lower than about 2μm., a thickness of about 0.1 to 0.7μm. and a ratio of diameter to thickness of about 10 to 1 to 200 to 1.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, wherein at least 75% of the pigment particles possess a diameter between 0.5 and 8μm.
Claim 4
Dependent Claim
22 words
A composition according to claim 1, wherein at least 75% of the pigment particles possess a thickness between 0.1 and 0.7 μm.
Claim 5
Dependent Claim
22 words
A composition according to claim 2, wherein at least 75% of the pigment particles possess a thickness between 0.1 and 0.7 μm.
Claim 6
Dependent Claim
36 words
A pigmented casein plastic composition according to claim 1 wherein the coated mica platelets have a diameter of about 1 to 10 microns and an average diameter in the range of about 3 to 7 microns.
Claim 7
Dependent Claim
20 words
An article of manufacture substantially free of cracks and pores produced by compressing and heating the composition of claim 1.
Claim 8
Independent Claim
59 words
A method of preventing crack formation in the production of casein plastic compositions pigmented with coated mica flakes which comprises imbedding into an aqueous casein paste a minor luster-imparting quantity of coated mica platelets with a diameter of about 1 to 10 microns and average diameter of about 3 to 7 microns, and compressing and heating the resultant mass.
Claim 9
Independent Claim
59 words
A method of preventing crack formation in the production of casein plastic compositions pigmented with coated mica flakes which comprises imbedding into an aqueous casein paste a minor luster-imparting quantity of coated mica platelets with a diameter of about 1 to 10 microns and average diameter of about 3 to 7 microns, and compressing and heating the resultant mass.
References Cited (Backward Citations)
US2332829A
Cited
US3087827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |