Patterned plastic optical components
US5128802A · kind A · utility
1Cited by
8References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H9/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A transparent plastic slide for microscopic examination of fluids with at least one grid defined on the floor portion of the slide. The grid consisting of lines rising symmetrically from the floor portion of the slide with a line width of from about 0.05 to 0.005 mm. The lines defining enclosed areas, in which particles suspended in sample fluids can be counted. The sizes of enclosed areas being selected to be within the field of view for microscopic examination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.