US2728663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing molecular compounds of mercuric salts with amines
Assignee: Eastman Kodak Co
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Filing: 1952-11-08
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Granted: 1955-12-27
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Expires: 1972-11-08
Abstract
No abstract record available.
Inventors
- 👤 Charles F H Allen
- 👤 Jr John R Byers
- 👤 Thomas F Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION CONTAINING A SMALL AMOUNT OF A MOLECULAR ADDITION COMPOUND OF A MERCURY SALT WITH A NITROGEN COMPOUND OF THE CLASS CONSISTING OF (1) HETEROCYCLIC NITROGEN COMPOUNDS IN WHICH AT LEAST 3 BONDS OF THE HETEROCYCLIC NITROGEN ATOM ARE ATTACHED TO CARBON, (2) AMINE-SUBST ITUTED MONONUCLEAR AROMATIC COMPOUNDS IN WHICH 3 BONDS OF THE AMINONITROGEN ATOM ARE ATTACHED TO CARBON, (3) THEIR HALOGEN ACID SALTS, AND (4) THE HALOGEN ACID SALTS OF ALIPHATIC AMINES CONTAINING AT LEAST 3 CARBON ATOMS.
Claim 2
Dependent Claim
84 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION CONTAINING A SMALL AMOUNT OF A MOLECULAR ADDITION COMPOUND OF A MERCURY SALT WITH A NITROGEN COMPOUND OF THE CLASS CONSISTING OF (1) HETEROCYCLIC NITROGEN COMPOUNDS IN WHICH AT LEAST 3 BONDS OF THE HETEROCYCLIC NITROGEN ATOM ARE ATTACHED TO CARBON, (2) AMINE-SUBST ITUTED MONONUCLEAR AROMATIC COMPOUNDS IN WHICH 3 BONDS OF THE AMINONITROGEN ATOM ARE ATTACHED TO CARBON, (3) THEIR HALOGEN ACID SALTS, AND (4) THE HALOGEN ACID SALTS OF ALIPHATIC AMINES CONTAINING AT LEAST 3 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |