Patent US3843364A successfully refreshed from Google Patents.
US3843364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature processing of photographic elements
Assignee: Agfa Gevaert NV
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Filing: 1972-11-03
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Granted: 1974-10-22
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Expires: 1992-11-03
Abstract
Abstract 1. METHOD OF PRODUCING PHOTOGRAPHIC IMAGES BY DEVELOPMENT IN A PROCESS WHICH EMPLOYS ROLLERS AT A TEMPERATURE AVOVE 30*C. OF AN EXPOSED PHOTOGRAPHIC SILVER HALIDE MATERIAL COMPRISNG AT LEAST ONE SILVER HALIDE EMULSION LAYER WHEREIN THE SAID EMULSION LAYER OR A HYDROPHILIC COLLOID LAYER IN WATER-PERMEABLE RELATIONSHIP THEREWITH COMPRISES A POLYMERIC COMPOUND, WHICH IS A POLYMER WHEREIN AT LEAST 15 MOLE PERCENT OF THE RECURRING UNITS ARE OF A N-HYDROXYALKYL(METH)ACRYLAMIDE OR OF A LOWER ALKYL ETHER THEREOF, WHEREIN THE ALKYL GROUPS REFERRED TO ARE C1-C5 ALKYL GROUPS, WHEREBY THE PRESSURE MARKS ON SAID MATERIAL ARE REDUCED.
Inventors
- 👤 R Florens
- 👤 H Vandenabeele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:17
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
METHOD OF PRODUCING PHOTOGRAPHIC IMAGES BY DEVELOPMENT IN A PROCESS WHICH EMPLOYS ROLLERS AT A TEMPERATURE AVOVE 30*C. OF AN EXPOSED PHOTOGRAPHIC SILVER HALIDE MATERIAL COMPRISNG AT LEAST ONE SILVER HALIDE EMULSION LAYER WHEREIN THE SAID EMULSION LAYER OR A HYDROPHILIC COLLOID LAYER IN WATER-PERMEABLE RELATIONSHIP THEREWITH COMPRISES A POLYMERIC COMPOUND, WHICH IS A POLYMER WHEREIN AT LEAST 15 MOLE PERCENT OF THE RECURRING UNITS ARE OF A N-HYDROXYALKYL(METH)ACRYLAMIDE OR OF A LOWER ALKYL ETHER THEREOF, WHEREIN THE ALKYL GROUPS REFERRED TO ARE C1-C5 ALKYL GROUPS, WHEREBY THE PRESSURE MARKS ON SAID MATERIAL ARE REDUCED.
Claim 2
Dependent Claim
95 words
METHOD OF PRODUCING PHOTOGRAPHIC IMAGES BY DEVELOPMENT IN A PROCESS WHICH EMPLOYS ROLLERS AT A TEMPERATURE AVOVE 30*C. OF AN EXPOSED PHOTOGRAPHIC SILVER HALIDE MATERIAL COMPRISNG AT LEAST ONE SILVER HALIDE EMULSION LAYER WHEREIN THE SAID EMULSION LAYER OR A HYDROPHILIC COLLOID LAYER IN WATER-PERMEABLE RELATIONSHIP THEREWITH COMPRISES A POLYMERIC COMPOUND, WHICH IS A POLYMER WHEREIN AT LEAST 15 MOLE PERCENT OF THE RECURRING UNITS ARE OF A N-HYDROXYALKYL(METH)ACRYLAMIDE OR OF A LOWER ALKYL ETHER THEREOF, WHEREIN THE ALKYL GROUPS REFERRED TO ARE C1-C5 ALKYL GROUPS, WHEREBY THE PRESSURE MARKS ON SAID MATERIAL ARE REDUCED.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |