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US4401992A
Expired / Lapsed
US
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Method of marking a synthetic material surface and to an object having the marked synthetic material surface
Assignee: US Philips Corp
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Filing: 1981-02-25
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Granted: 1983-08-30
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Expires: 2001-02-25
Abstract
Abstract A method of marking objects having a surface of a synthetic material and an object having the marked synthetic material for the purpose of identification which method comprises exposing the surface of the synthetic material to a laser beam of light of intensity of at least 1000 kW/cm 2 at the surface of the material and wherein the synthetic material contains a dye and a silicon-containing inorganic compound or a dye comprising silicon, such as, a sulphur containing sodium aluminium silicate which is decomposed to form a color contrast mark on the surface on exposure to said laser beam.
Inventors
- 👤 Henricus H. M. Vorst
- 👤 Jozef J. J. Bastiaens
- 👤 Enno C. Munk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:57
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/267; B29; B29C; B29C59/00; B29C59/16; B44; B44B; B44B7/00; B23; B23K; B23K2101/00; B23K2101/007; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0838; B29K; B29K2105/00; B29K2105/06; B29K2105/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A method of marking an object having a synthetic resin surface by causing a color contrast pattern to be formed in said surface by exposure of said surface to a laser beam, characterized in that present in said surface is a colored inorganic silicate pigment or a mixture of a dye and a silicate glass and that desired areas of said surface are exposed to a laser beam having an intensity of at least 1000 kw/cm 2 , measured on said surface, thereby decomposing said inorganic silicate pigment or said dye at said exposed areas and thereby changing the color of said exposed areas of said surface.
Claim 2
Independent Claim
107 words
A method of marking an object having a synthetic resin surface by causing a color contrast pattern to be formed in said surface by exposure of said surface to a laser beam, characterized in that present in said surface is a colored inorganic silicate pigment or a mixture of a dye and a silicate glass and that desired areas of said surface are exposed to a laser beam having an intensity of at least 1000 kw/cm 2 , measured on said surface, thereby decomposing said inorganic silicate pigment or said dye at said exposed areas and thereby changing the color of said exposed areas of said surface.
Claim 3
Dependent Claim
17 words
An object having a synthetic material surface marked in accordance with the method claimed in claim 1.
Claim 4
Dependent Claim
15 words
A method as claimed in claim 2, characterized in that the pigment is Ultramarine blue.
Claim 5
Dependent Claim
46 words
The method of claim 1 characterized in that the synthetic resin surface includes a sulfur-containing sodium aluminum silicate pigment and that desired areas of said surface are exposed to a laser beam having an intensity of at least 1000 kw/cm 2 , measured on said surface.
Claim 6
Dependent Claim
43 words
A method as claimed in claim 1, characterized in that the synthetic material surface is exposed through a mask and a converging lens to 1-5 pulses of a pulsed laser having a pulse duration of 0.1-4 microseconds and a frequency of 0.1-100 Hz.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |