US2691580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing contrast of halftone reproductions
Assignee: Eastman Kodak Co
•
Filing: 1953-08-27
•
Granted: 1954-10-12
•
Expires: 1973-08-27
Abstract
No abstract record available.
Inventors
- 👤 Donald J Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:36
CPC Classifications
G; G03; G03F; G03F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF MAKING A HALFTONE RECORD ON A CLAYDEN DESENSITIZABLE SILVER HALIDE PHOTOSENSITIVE SHEET MATERIAL WHICH COMPRISES PLACING A HALFTONE SCREEN IN FRONT OF THE MATERIAL, EXPOSING THE MATERIAL THROUGH THE SCREEN TWICE, FIRST TO A UNIFORM HIGH INTENSITY SHORT DURATION EXPOSURE TO CLAYDEN DESENSITIVE THE AREAS BESHIND THE TRANSPARENT PARTS OF THE SCREEN AND SECOND TO A CONTINUOUS TONE IMAGE OF LOWER INTENSITY AND FOR LONGER DURATION AND THEN DEVELOPING THE MATERIAL.
Claim 2
Independent Claim
74 words
THE METHOD OF MAKING A HALFTONE RECORD ON A CLAYDEN DESENSITIZABLE SILVER HALIDE PHOTOSENSITIVE SHEET MATERIAL WHICH COMPRISES PLACING A HALFTONE SCREEN IN FRONT OF THE MATERIAL, EXPOSING THE MATERIAL THROUGH THE SCREEN TWICE, FIRST TO A UNIFORM HIGH INTENSITY SHORT DURATION EXPOSURE TO CLAYDEN DESENSITIVE THE AREAS BESHIND THE TRANSPARENT PARTS OF THE SCREEN AND SECOND TO A CONTINUOUS TONE IMAGE OF LOWER INTENSITY AND FOR LONGER DURATION AND THEN DEVELOPING THE MATERIAL.
References Cited (Backward Citations)
US2306936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |