Patent US3048486A successfully refreshed from Google Patents.
US3048486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic positive printing system
Assignee: Peerless Photo Products Inc
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Filing: 1960-02-01
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Granted: 1962-08-07
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Reinhold E Basch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:45
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A DIFFUSION TRANSFER REVERSAL PHOTOCOPYING PROCESS WHICH COMPRISES WETTING A PHOTOGRAPHIC NEGATIVE SHEET AND A PHOTOGRAPHIC POSITIVE SHEET WITH A DEVELOPING SOLUTION CONTAINING A SILVER HALIDE FIXER AND A SILVER HALIDE DEVELOPER, ONE FACE OF SAID PHOTOGRAPHIC NEGATIVE SHEET HAVING A GELATINOUS COATING EMBODYING AN EXPOSED UNDEVELOPED SILVER HALIDE PRIOR TO SAID WETTING AND ONE FACE OF SAID PHOTOGRAPHIC POSITIVE SHEET HAVING A GELATINOUS COATING EMBODYING COLLOIDAL SILVER NUCLEII AND 2-AMINO5-MERCAPTO-1,3,4-THIADIAZOLE, PRESSING SAID WETTED SHEETS TOGETHER IN FACE TO FACE RELATIONSHIP SO THAT THE SURFACES OF SAID INDIVIDUAL COATINGS ARE IN INTIMATE CONTACT, THEREBY PRODUCING A FULLY DEVELOPED IMAGE ON SAID COATING OF SAID PHOTOGRAPHIC POSITIVE SHEET, AND SEPARATING SAID SHEETS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |