U.S. patent number 3,738,251 [Application Number 05/207,005] was granted by the patent office on 1973-06-12 for photographic developing tray. Invention is credited to Walter L. Haaser.
United States Patent | 3,738,251 |
Haaser | June 12, 1973 |
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: | Haaser; Walter L. (El Paso County, CO) |
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Family ID: | 22768823 |
Appl. No.: | 05/207,005 |
Filed: | December 13, 1971 |
Current U.S. Class: | 134/201; 4/656; 4/619; 206/557; 396/636 |
Current CPC Class: | G03D 13/04 (20130101) |
Current International Class: | G03D 13/02 (20060101); G03D 13/04 (20060101); G03d 001/04 () |
Field of Search: | ;95/95,96,89 ;206/72 |
3013656 | December 1961 | Murphy, Jr. |
2720969 | October 1955 | Kendall |
3589511 | June 1971 | Britt |
1045101 | November 1912 | Wojidkow |
49,880 | Nov 1888 | DD | |||
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