US2731347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing fluorine substituted ethylene polymers as delustering agents
Assignee: EIDP Inc
•
Filing: 1951-10-20
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Granted: 1956-01-17
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Russell H Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS OF DELUSTERING WATER-PERMEABLE, ORGANIC, PROTECTIVE COLLOID LAYERS WHICH COMPRISES ADMIXING AN AQUEOUS SOLUTION OF WATER-PERMEABLE, ORGANIC, PROTECTIVE COLLOID WITH AN AQUEOUS DISPERSION OF FINELY DIVIDED PARTICLES OF AN ETHYLENIC ADDITION POLYMER AT LEAST 65% BY WEIGHT OF A POLYMER UNITS BEING FLUORINE-SUBSTITUTED ETHYLENE UNITS CONTAINING 3 TO 4 FLUORINE ATOMS, SAID PARTICLES HAVING SIZES WITHIN THE RANGE OF 0.05 TO 25.0 MICRONS, AND COATING THE RESULTING DISPERSION ONTO A SHEET SUPPORT.
Claim 2
Dependent Claim
73 words
A PROCESS OF DELUSTERING WATER-PERMEABLE, ORGANIC, PROTECTIVE COLLOID LAYERS WHICH COMPRISES ADMIXING AN AQUEOUS SOLUTION OF WATER-PERMEABLE, ORGANIC, PROTECTIVE COLLOID WITH AN AQUEOUS DISPERSION OF FINELY DIVIDED PARTICLES OF AN ETHYLENIC ADDITION POLYMER AT LEAST 65% BY WEIGHT OF A POLYMER UNITS BEING FLUORINE-SUBSTITUTED ETHYLENE UNITS CONTAINING 3 TO 4 FLUORINE ATOMS, SAID PARTICLES HAVING SIZES WITHIN THE RANGE OF 0.05 TO 25.0 MICRONS, AND COATING THE RESULTING DISPERSION ONTO A SHEET SUPPORT.
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |