US2666703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-powder photographic developers stabilized with metaboric acid
Assignee: Eastman Kodak Co
•
Filing: 1952-06-26
•
Granted: 1954-01-19
•
Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Donald J Kridel
- 👤 Edwin S Wiitala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:44
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/264; G03C5/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A STABLE SINGLE-POWDER PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING AN ORGANIC SILVER HALIDE DEVELOPER, A STABILIZING AGENT COMPRISING METABORIC ACID AND A SOLUBLE, STABLE, AND PHOTOGRAPHICALLY COMPATIBLE BASIC INGREDIENT SELECTED FROM THE GROUP CONSISTING OF ALKALI BORATES, SULFITES AND CARBONATES.
Claim 2
Dependent Claim
38 words
A STABLE SINGLE-POWDER PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING AN ORGANIC SILVER HALIDE DEVELOPER, A STABILIZING AGENT COMPRISING METABORIC ACID AND A SOLUBLE, STABLE, AND PHOTOGRAPHICALLY COMPATIBLE BASIC INGREDIENT SELECTED FROM THE GROUP CONSISTING OF ALKALI BORATES, SULFITES AND CARBONATES.
References Cited (Backward Citations)
US2606118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |