Patent US3712814A successfully refreshed from Google Patents.
US3712814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material
Assignee: Agfa Gevaert AG
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Filing: 1970-12-22
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Granted: 1973-01-23
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Expires: 1990-12-22
Abstract
Abstract PHOTOGRAPHIC LAYERS CONTANING A COMPOUND HAVING THE FORMULA: R-(-CH<(-C(=O)-N(-R'')-C(=O)-))2 AS EXPLAINED BELOW BECOME LESS SOLUBLE OR LESS SWELLABLE UPON EXPOSURE AT THE LIGHT-STRUCT AREAS. A RELIEF IMAGE IS OBTAINED AFTER REMOVAL OF THE UNEXPOSED AREAS.
Inventors
- 👤 E Ranz
- 👤 W Neumann
- 👤 Rintelen H Von
- 👤 H Schutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:57
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/06; C09; C09B; C09B5/00; C09B5/62; G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C5/00; G03C5/56; G03F; G03F7/00; G03F7/004; G03F7/0045; G03F7/038
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |