US3816133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of photographic images by modifying vesicular images
Assignee: Agfa Gevaert AG
•
Filing: 1972-02-02
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Granted: 1974-06-11
•
Expires: 1992-02-02
Abstract
Abstract Photographic images are produced by forming in a light-sensitive photographic layer a vesicular image which subsequently is transformed by treatment with a swelling agent for the binder into a stable image consisting of differences in the refractive index; the latter image can be made visible by suitable optical means.
Inventors
- 👤 E Weyde
- 👤 M Scheibitz
- 👤 R Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:41
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
The process of claim 1 wherein the deflected light forms the visible image by the optical schlieren method.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein the deflected light passing through the layer is made visible by the oblique illumination method.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the deflected light passing through the layer is made visible by the shadow projection method.
Claim 4
Dependent Claim
22 words
The process of claim 1, wherein the binding agent of the silver salt emulsion layer consists wholly or in part of gelatin.
References Cited (Backward Citations)
GB402737A
Cited
GB645825A
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US2911299A
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US3298833A
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US3316088A
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US3594166A
Cited
US3615476A
Cited
US3549376A
Cited
US3615491A
Cited
US3694207A
Cited
US3684511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |