US3806342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite diffusion transfer photographic product and process
Assignee: Polaroid Corp
•
Filing: 1970-12-28
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Granted: 1974-04-23
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Expires: 1990-12-28
Abstract
Abstract PHOTOGRAPHIC PRODUCTS FOR PROVIDING DIFFUSION TRANSFER IMAGE PATTERNS AND HAVING THE CAPABILITY OF BEING DEVELOPED BY MOISTURE PREFERABLY IN THE FORM OF STEAM. ESSENTIAL ELEMENTS OF THE PREFERRED PRODUCTS OF THE PRESENT INVENTION ARE A MOISTURE ACTIVATABLE PROCESSING SYSTEM INTEGRATED WITH A DIFFUSION TRANSFER IMAGE PATTERN RECEIVING LAYER, A LAYER COMPRISING AN OPACIFICATION SYSTEM WHICH CAN PROVIDE A REFLECTIVE BACKGROUND FOR VIEWING THE DIFFUSION TRANSFER IMAGE PATTERN AND AT THE SAME TIME EFFECTIVELY MASK A DEVELOPED IMAGE PATTERN IN AN UNDERLYING LAYER COMPRISING A PHOTOSENSITIVE SYSTEM.
Inventors
- 👤 L Farney
- 👤 C Groncki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:54
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/44; G03C8/02; G03C8/04; G03C8/06
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) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |