Patent US3588439A successfully refreshed from Google Patents.
US3588439A
Expired / Lapsed
US
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High resolution laser engraving apparatus
Assignee: RCA Corp
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Filing: 1967-05-12
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Granted: 1971-06-28
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Expires: 1987-05-12
Abstract
Abstract A PULSED LASER ILLUMINATES AN ENTIRE GIVEN AREA OF THE SURFACE OF A MEMBER TO BE ENGRAVED WITH COHERENT LIGHT WHICH VARIES IN RELATIVE INTENSITY FROM POINT TO POINT OVER ITS CROSS SECTION IN ACCORDANCE WITH A PREDETERMINED PATTERN. IT HAS BEEN FOUND THAT IF THE ABSOLUTE INTENSITY AND TIME OF DURATION OF THE PULSE OF COHERENT LIGHT ARE PROPER, IT IS POSSIBLE TO OBTAIN ENGRAVINGS IN WHICH DETAILS OF THE ORDER OF 2 MICRONS IN THE ENGRAVED PATTERN CAN BE RESOLVED. THIS MAKES IT POSSIBLE TO ENGRAVE NOT ONLY PICTORIAL PATTERNS, BUT ALSO HOLOGRAM PATTERNS.
Inventors
- 👤 Macy E Heller
- 👤 Hendrik J Gerritsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/066; G03H1/02; G03H1/0272; G03H1/024; G03H1/0244; G03H2001/026; G03H1/0402; G03H2001/0428; G03H1/0465; G03H2001/0471; G03H2210/00; G03H2210/20; G03H2210/30; G03H2222/00; G03H2222/33; G03H2240/00; G03H2240/20; G03H2240/25; G03H2260/00; G03H2260/50; G03H2260/62; G03H2270/00; G03H2270/10; G03H2270/13; G03H2270/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |