Patent US3261683A successfully refreshed from Google Patents.
US3261683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing transfer copies and compositions for use therein
Assignee: GAF Chemicals Corp
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Filing: 1960-05-02
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Granted: 1966-07-19
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Sottysiak
- 👤 Proc John
- 👤 Charles M Hovancik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:05
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PHOTOGRAPHIC DIFFUSION-TRANSFER REVERSAL PROCESS WHICH COMPRISES EXPOSING TO LIGHT A PHOTOGRAPHIC ELEMENT HAVING A LIGHT-SENSITIVE EMULSION LAYER THEREON COMPRISING SILVER HALIDE AND A COLLOID TO FORM AN IMAGE THEREON AND CONTACTING SAID IMAGE WITH A RECEIVING LAYER COMPRISING A COLLOID, A SILVER HALIDE DEVELOPING AGENNT AND BISMUTH NITRATE IN THE PRESENCE OF A SILVER HALIDE DEVELPING SOLUTION AND A SILVER HALIDE SOLVENT.
Claim 2
Dependent Claim
63 words
A PHOTOGRAPHIC DIFFUSION-TRANSFER REVERSAL PROCESS WHICH COMPRISES EXPOSING TO LIGHT A PHOTOGRAPHIC ELEMENT HAVING A LIGHT-SENSITIVE EMULSION LAYER THEREON COMPRISING SILVER HALIDE AND A COLLOID TO FORM AN IMAGE THEREON AND CONTACTING SAID IMAGE WITH A RECEIVING LAYER COMPRISING A COLLOID, A SILVER HALIDE DEVELOPING AGENNT AND BISMUTH NITRATE IN THE PRESENCE OF A SILVER HALIDE DEVELPING SOLUTION AND A SILVER HALIDE SOLVENT.
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |