Patent US2575033A successfully refreshed from Google Patents.
Patent US3694209A successfully refreshed from Google Patents.
US3694209A
Expired / Lapsed
US
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Process for the development of exposed photographic material containing silver halide
Assignee: Novartis AG
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Filing: 1970-03-09
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Granted: 1972-09-26
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Expires: 1990-03-09
Abstract
Abstract A PROCESS FOR RAPID DEVELOPING OF EXPOSED PHOTOGRAPHIC SILVER HALIDE MATERIAL, ESPECIALLY X-RAY FIBERS IS PROVIDED. THE PROCESS CONSISTS IN FIRST TREATING THE MATERIAL WITH A STRONG ALKALI METAL HYDROXIDE SOLUTION AND THEN WITH THE DEVELOPER SOLUTION AND AFTERWARDS CARRYING OUT THE PROCESSING STEPS REQUIRED FOR FINISHING THE PHOTOGRAPH. THE DEVELOPING BATH MAY BE FOLLOWED BY A SECOND ALKALINE BATH. THIS PROCESS MAKES IT POSSIBLE TO OBTAIN STABLE IMMEDIATELY VISIBLE PICTURE SHORTLY, E.G. 14 SECONDS, AFTER EXPOSURE.
Inventors
- 👤 Georg Schwienbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:32
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; Y; Y10; Y10S; Y10S430/00; Y10S430/164; Y10S430/167
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |