US3738251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developing tray
Assignee: Individual
•
Filing: 1971-12-13
•
Granted: 1973-06-12
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Expires: 1991-12-13
Abstract
Abstract The present invention relates to photographic developing trays and more specifically to a novel tray having a parabolic shaped fluid holding recess with a central portion thereof enlarged and deepened to accommodate the fingers of one holding the print being processed and having sloping drain boards on either side of the fluid recess.
Inventors
- 👤 W Haaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:16
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A developing tray for photographic film comprising a unitary structure having a generally rectangularly-shaped base with elevated end and side walls, the top portion of said side walls carrying a pair of oppositely disposed, inwardly slanting, drainboards and a depending basin therebetween, wherein the said basin includes an enlarged and deepened portion at the longitudinal center of said basin.
Claim 2
Dependent Claim
59 words
A developing tray for photographic film comprising a unitary structure having a generally rectangularly-shaped base with elevated end and side walls, the top portion of said side walls carrying a pair of oppositely disposed, inwardly slanting, drainboards and a depending basin therebetween, wherein the said basin includes an enlarged and deepened portion at the longitudinal center of said basin.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |