US2728668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing a 1,2-dithiolane
Assignee: EIDP Inc
•
Filing: 1952-12-05
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Granted: 1955-12-27
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Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 Mochel Walter Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; Y; Y10; Y10S; Y10S430/00; Y10S430/15; Y10S430/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AN EMULSION OF LIGHT-SENSITIVE HALIDE IN A SYNTHETIC, WATER-PERMEABLE COLLOID, SAID EMULSION CONTAINING A 1,2-DITHIOLANE COMPOUND.
Claim 2
Dependent Claim
16 words
AN EMULSION OF LIGHT-SENSITIVE HALIDE IN A SYNTHETIC, WATER-PERMEABLE COLLOID, SAID EMULSION CONTAINING A 1,2-DITHIOLANE COMPOUND.
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 |