US3782950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material
Assignee: Agfa Gevaert AG
•
Filing: 1972-03-10
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Granted: 1974-01-01
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Expires: 1992-03-10
Abstract
Abstract PHOTOGRAPHIC LAYERS CONTAINING A LIGHT-SENSITIVE CYCLIC ARYL POLYCARBOXYLIC ACID IMIDE AND A COMPOUND HAVING AT LEAST ONE OLEFINIC DOUBLE BONDS OR HAVING GROUPS CAPABLE OF FORMING OLEFINIC DOUBLE BONDS, UPON EXPOSURE BECOME LESS SOLUBLE OR LESS SWELLABLE UPON EXPOSURE AT THE LIGHTSTRUCK AREAS. A RELEIF IMAGE IS OBTAINED AFTER REMOVAL OF THE UNEXPOSED AREAS.
Inventors
- 👤 E Ranz
- 👤 W Himmelmann
- 👤 P Bergthaller
- 👤 J Hocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:30
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C08; C08F; C08F2/00; C08F2/46; G; G03; G03F; G03F3/00; G03F3/10; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; G03F7/038; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/112
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |