US5165982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped plastic article having a grained surface of improved scratch resistance
Assignee: Hoechst AG
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Filing: 1990-09-17
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Granted: 1992-11-24
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Expires: 2010-09-17
Abstract
Abstract The scratch resistance of plastic surfaces can be improved by providing the surfaces with a novel grain structure.
Inventors
- 👤 Franz Gubitz
- 👤 Walter Grolik
- 👤 Eckhard Kuhnhenne
- 👤 Peter Jaksch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:47
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24174; Y10T428/24182; Y10T428/24355; Y10T428/24479; Y10T428/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A shaped plastic article having a grained surface of improved scratch resistance, wherein the surface includes grain hills, a) the grain hills have a rounded surface on all sides, b) the grain hills are completely separated from one another by grain valleys, c) there are from 13 to 25 grain hills over a distance of 10 mm, d) the average roughness depth of the grained surface is from 42 to 58 μm, e) the grain hills are relatively flat and of substantially uniform height, f) the grain hills are in an irregular arrangement, and g) the grain hills form elevations on a planar surface.
Claim 2
Dependent Claim
104 words
A shaped plastic article having a grained surface of improved scratch resistance, wherein the surface includes grain hills, a) the grain hills have a rounded surface on all sides, b) the grain hills are completely separated from one another by grain valleys, c) there are from 13 to 25 grain hills over a distance of 10 mm, d) the average roughness depth of the grained surface is from 42 to 58 μm, e) the grain hills are relatively flat and of substantially uniform height, f) the grain hills are in an irregular arrangement, and g) the grain hills form elevations on a planar surface.
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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |