US3829315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for making half-tone prints
Assignee: Kalle GmbH and Co KG
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Filing: 1972-10-20
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Granted: 1974-08-13
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Expires: 1992-10-20
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR THE PRODUCTION OF A PRINTING PLATE CAPABLE OF REPRODUCING CONTINUOUS TONES, WHEREIN A LIGHT-SENSITIVE MATERIAL SUITABLE FOR THE PRODUCTION OF A PRINTING PLATE IS EXPOSED UNDER A CONTINUOUS TONE ORGINIAL, EXPOSURE LIGHT BEING CAUSED TO TRAVERSE A LAYER WHICH PRESENTS SUFFICIENTLY UNIFORMLY DISTRIBUTED AREAS OF 0.05 TO 10 MICRONS IN DIAMETER, THE LIGHT:TRANSMISSION CAPACITY OF WHICH AREAS CONTRASTS WITH THAT OF THEIR IMMEDIATE ENVIROMENT, THIS CONTRAST LAYER BEING OF THE NATURE OF A SO-CALLED SHADOW PATTERN, AND THE EXPOSED MATERIAL IS DEVELOPED AND, IF DESIRED, ETCHED.
Inventors
- 👤 G Schadlich
- 👤 R Haenisch
- 👤 R Moraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:25
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/115
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |