Markers for dental x-ray film and packets for simplified film mounting
US5202911A · kind A · utility
Inventor
Key dates
| Filing date | Feb 10, 1992 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Feb 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C3/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A radiographic film packet is adapted to be placed in a patient's mouth for exposing a sheet of dental film to x-rays generated by an x-ray tube. The packet comprises: a light-proof envelope having a first side and second side defining a pocket for receiving the film sheet; a sheet of lead disposed within the pocket adjacent the second side; a sheet of film disposed within the pocket between the lead sheet and the first side; an indicator affixed to the first side of the envelope, the indicator expressly designated the edge of the film packet appointed to be uppermost in the mouth during radiographic exposure; and a marker comprising a perforation in the periphery of the film sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.