Patent US2819965A successfully refreshed from Google Patents.
US2819965A
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Carboxymethylmercapto compounds as stabilizers for photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1956-02-23
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Granted: 1958-01-14
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Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Murray
- 👤 James A Van Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:23
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; A; A61; A61J; A61J3/00; A61J3/07; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42; C07D233/54; C07D233/66; C07D233/84; C07D239/32; C07D239/38; C07D239/50; C07D239/56; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; C07D249/14; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/48; C07D251/52; C07D253/00; C07D253/02; C07D253/06; C07D253/065; C07D253/07; C07D253/075; C07D263/00; C07D263/52; C07D263/54; C07D263/58; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/74; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A MONOHETEROCYCLIC NITROGEN COMPOUND CONTAINING A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF A CARBOXYMETHYLMERCAPTO GROUP AND A SALT OF CARBOXYMETHYLMERCAPTO GROUP, SAID SUBSTITUENT BEING ATTACHED TO SAID MONOHETEROCYCLIC NITROGEN COMPOUND IN THE A-POSITION WITH RESPECT TO THE NITROGEN ATOM OF SAID NITROGEN COMPOUND.
Claim 2
Dependent Claim
50 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A MONOHETEROCYCLIC NITROGEN COMPOUND CONTAINING A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF A CARBOXYMETHYLMERCAPTO GROUP AND A SALT OF CARBOXYMETHYLMERCAPTO GROUP, SAID SUBSTITUENT BEING ATTACHED TO SAID MONOHETEROCYCLIC NITROGEN COMPOUND IN THE A-POSITION WITH RESPECT TO THE NITROGEN ATOM OF SAID NITROGEN COMPOUND.
References Cited (Backward Citations)
GB699888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |