US3554750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of photographic images
Assignee: Agfa Gevaert AG
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Filing: 1966-12-13
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Granted: 1971-01-12
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Expires: 1986-12-13
Abstract
Abstract THE INVENTION RELATES TO A PROCESS FORTHE PRODUCTION OF PHOTOGRAPHIC IMAGES, IN PARTICULAR A COPYING PROCESS, WHEREIN A SUPPORTED LAYER WHICH CONTAINS IMAGEWISELY DISTRIBUTED DEVELOPMENT NUCLEI FOR DISSOLVED SILVER SALTS, IN EITHER VISIBLE OR INVISIBLE FORM, IS DEVELOPED IN THE PRESENCE OF AN AQUEOUS SOLUTION OF SILVER SALTS SOLUBLE IN WATER AT PH VALUES BETWEEN 1 AND 7.
Inventors
- 👤 Edith Weyde
- 👤 Anita Von Konig
- 👤 Harald Von Rintelen
- 👤 Siegfried Wagner
- 👤 Hans-Jorg Metz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:28
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/88; C07D233/00; C07D233/54; C07D233/66; C07D233/84; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/28; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/38; C07D239/46; C07D239/56; C07D239/58; C07D239/60; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/44; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; C07D263/00; C07D263/52; C07D263/54; C07D263/58; C07D263/60; C07D277/00; C07D277/60; C07D277/62; C07D277/64; C07D277/68; C07D277/70; C07D277/74; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C5/00; G03C5/58; G03C8/00; G03C8/02; G03C8/04
Claims Analysis
Total Claims: 0
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |