US2833650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions
Assignee: EIDP Inc
•
Filing: 1955-02-07
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Granted: 1958-05-06
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Expires: 1975-02-07
Abstract
No abstract record available.
Inventors
- 👤 Schacklett Comer Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN EMULSION OF LIGHT-SENSITIVE SILVER HALIDE IN A WATER-PERMEABLE COLLOID BINDING AGENT WHEREIN AT LEAST 2% BY WEIGHT IS AN ADDITION COPOLYMER HAVING HYDROPHILIC PROPERTIES COMPOSED SOLELY OF A SUBSTANTIAL NUMBER OF RECURRING INTRALINEAR UNITS OF (A) AT LEAST ONE TYPE OF UNIT TAKEN FROM THE GROUP CONSISTING OF THOSE OF FORMULAE:
Claim 2
Dependent Claim
52 words
AN EMULSION OF LIGHT-SENSITIVE SILVER HALIDE IN A WATER-PERMEABLE COLLOID BINDING AGENT WHEREIN AT LEAST 2% BY WEIGHT IS AN ADDITION COPOLYMER HAVING HYDROPHILIC PROPERTIES COMPOSED SOLELY OF A SUBSTANTIAL NUMBER OF RECURRING INTRALINEAR UNITS OF (A) AT LEAST ONE TYPE OF UNIT TAKEN FROM THE GROUP CONSISTING OF THOSE OF FORMULAE:
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |