US2678886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of photographs in golden tones and compositions thereof
Assignee: Individual
•
Filing: 1953-04-28
•
Granted: 1954-05-18
•
Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Ficker Vera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:49
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PHOTOGRAPHIC DEVELOPER CONTAINING AN ALKALI SULPHITE, GLYCINE, HYDROQUINONE, AN ALKALI CARBONATE AND AN ALKALI BROMIDE IN RESPECTIVE PROPORTIONS TO 2 GALLONS OF WATER SUBSTANTIALLY AS FOLLOWS: 4 OUNCES AND 80 GRAINS 1/4 OUNCE 3/4 OF AN OUNCE 9 OUNCES 4 OUNCES
Claim 2
Dependent Claim
42 words
A PHOTOGRAPHIC DEVELOPER CONTAINING AN ALKALI SULPHITE, GLYCINE, HYDROQUINONE, AN ALKALI CARBONATE AND AN ALKALI BROMIDE IN RESPECTIVE PROPORTIONS TO 2 GALLONS OF WATER SUBSTANTIALLY AS FOLLOWS: 4 OUNCES AND 80 GRAINS 1/4 OUNCE 3/4 OF AN OUNCE 9 OUNCES 4 OUNCES
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |