Patent US2682465A successfully refreshed from Google Patents.
US2682465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of packaging and stabilizing single-powder developers
Assignee: Eastman Kodak Co
•
Filing: 1952-06-26
•
Granted: 1954-06-29
•
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
2026-11-09 08:32
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/264; G03C5/267
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 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 IN WHICH IS POSITIONED A CLOSED PERMEABLE BAG CONTAINING A STABILIZER SELECTED FROM THE GROUP CONSISTING OF BORIC ANHYDRIDE, METABORIC ACID, AND MIXTURES OF BORIC ANHYDRIDE WITH PHTHALIC ANHYDRIDE AND MIXTURES OF METABORIC ACID AND PHTHALIC ANHYDRIDE.
Claim 2
Independent Claim
78 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 IN WHICH IS POSITIONED A CLOSED PERMEABLE BAG CONTAINING A STABILIZER SELECTED FROM THE GROUP CONSISTING OF BORIC ANHYDRIDE, METABORIC ACID, AND MIXTURES OF BORIC ANHYDRIDE WITH PHTHALIC ANHYDRIDE AND MIXTURES OF METABORIC ACID AND PHTHALIC 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 |