US2688546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for treating photographic film to eliminate hypo
Assignee: Brown Forman Distillers Corp
•
Filing: 1952-11-20
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Granted: 1954-09-07
•
Expires: 1972-11-20
Abstract
No abstract record available.
Inventors
- 👤 Henry L Scott
- 👤 William F Hyatt
- 👤 James M Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COMPOSITION FOR TREATMENT OF PHOTOGRAPHIC FILMS FOR REMOVAL OF RESIDUAL HYPO COMPRISING: AN ALKALI METAL HALIDE; A HYPROCHLORITE SALT; AND A MAGNESIUM SALT.
Claim 2
Dependent Claim
24 words
A COMPOSITION FOR TREATMENT OF PHOTOGRAPHIC FILMS FOR REMOVAL OF RESIDUAL HYPO COMPRISING: AN ALKALI METAL HALIDE; A HYPROCHLORITE SALT; AND A MAGNESIUM SALT.
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |