Patent US2682464A successfully refreshed from Google Patents.
US2682464A
Expired / Lapsed
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Method of packaging and stabilizing single-powder developers
Assignee: Eastman Kodak Co
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Filing: 1952-06-26
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Granted: 1954-06-29
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Wiitala
- 👤 Donald J Kridel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:04
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/264; G03C5/267; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF STABILIZING A SINGLE-POWDER PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING AN ORGANIC SILVER HALIDE DEVELOPER AND A PHOTOGRAPHICALLY COMPATIBLE BASIC INGREDIENT SELECTED FROM THE GROUP CONSISTING OF ALKALI SULFITES AND CARBONATES WHICH COMPRISES PACKAGING THE DEVELOPER COMPOSITION IN A CLOSED CONTAINER HAVING A COATING ON THE INTERIOR SURFACE THEREOF OF FUSED BORIC ANHYDRIDE.
Claim 2
Independent Claim
53 words
THE METHOD OF STABILIZING A SINGLE-POWDER PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING AN ORGANIC SILVER HALIDE DEVELOPER AND A PHOTOGRAPHICALLY COMPATIBLE BASIC INGREDIENT SELECTED FROM THE GROUP CONSISTING OF ALKALI SULFITES AND CARBONATES WHICH COMPRISES PACKAGING THE DEVELOPER COMPOSITION IN A CLOSED CONTAINER HAVING A COATING ON THE INTERIOR SURFACE THEREOF OF FUSED BORIC ANHYDRIDE.
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) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |