Patent US2942975A successfully refreshed from Google Patents.
US2942975A
Expired / Lapsed
US
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Photosensitive material
Assignee: Keuffel and Esser Co
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Filing: 1955-05-05
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Granted: 1960-06-28
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Expires: 1975-05-05
Abstract
No abstract record available.
Inventors
- 👤 John D Eerde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/785; G03C1/005; G03C1/06; G03C1/30; G03C1/52; G03C1/66; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PHOTOSENSITIVE MATERIAL FOR PRODUCING A DARK RELIEF IMAGE COMPRISING A BASE, A SUBBING LAYER INCLUDING GELATIN AND A ZIRCONIUM SALT ON SAID BASE, A LIGHT SENSITIVE EMULSION LAYER INCLUDING A SILVER HALIDE, PHOTOGRAPHIC GLUE, AND A LIGHT HARDENING AGENT SELECTED FROM THE GROUP OF DICHROMATES AND DIAZIDO COMPOUNDS, SAID LIGHT SENSITIVE LAYER BEING COATED ON SAID SUBBING LAYER WHEREBY WHEN THE LIGHT SENSITIVE LAYER IS EXPOSED TO LIGHT THE EXPOSED PORTIONS OF SAID LIGHT SENSITIVE LAYER ADHERE SECURELY TO THE SUBBING LAYER.
Claim 2
Dependent Claim
83 words
A PHOTOSENSITIVE MATERIAL FOR PRODUCING A DARK RELIEF IMAGE COMPRISING A BASE, A SUBBING LAYER INCLUDING GELATIN AND A ZIRCONIUM SALT ON SAID BASE, A LIGHT SENSITIVE EMULSION LAYER INCLUDING A SILVER HALIDE, PHOTOGRAPHIC GLUE, AND A LIGHT HARDENING AGENT SELECTED FROM THE GROUP OF DICHROMATES AND DIAZIDO COMPOUNDS, SAID LIGHT SENSITIVE LAYER BEING COATED ON SAID SUBBING LAYER WHEREBY WHEN THE LIGHT SENSITIVE LAYER IS EXPOSED TO LIGHT THE EXPOSED PORTIONS OF SAID LIGHT SENSITIVE LAYER ADHERE SECURELY TO THE SUBBING LAYER.
References Cited (Backward Citations)
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US2675313A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |