US3761278A
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US
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Bonic acid ester stabilizing agent silver halide element containing a benzimidazoline 2 thione n n dicar
Assignee: Agfa Gevaert AG
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Filing: 1971-08-25
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Granted: 1973-09-25
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Expires: 1991-08-25
Abstract
Abstract A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A FOGSTABILIZING AMOUNT OF A BENZIMIDAZOLINE-2-THIONE-N,N''-DICARBONIC ACID ESTER.
Inventors
- 👤 W Gauss
- 👤 Bardorff W Mueller
- 👤 W Saleck
- 👤 A Koenig
- 👤 F Moll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:48
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D215/00; C07D215/02; C07D215/16; C07D215/36; C07D233/00; C07D233/54; C07D233/66; C07D233/84; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/28; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/46; C07D263/52; C07D263/54; C07D263/58; C07D263/60; C07D271/00; C07D271/02; C07D271/10; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |