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Laverne S. Birks and Mohammad Fatemi received US Patent No. 3,989,944 on November 2, 1976, filed September 5, 1975. It was assigned to United States Department of the Navy.
The patent's abstract:
A system for identifying chrysotile asbestos as well as other asbestiform bers in air pollution samples which comprises a collimated x-ray beam which is incident on parallel aligned asbestos fibers. Diffracted x-rays are detected by a proportional counter set at the diffraction line position for the (002) plane. Background intensity may be detected by a second counter set above the axis, or the sample may be rotated 90° and the one detector used to detect diffracted and background x-rays.
- Author
- Laverne S. Birks; Mohammad Fatemi
- Published by
- US Patent and Trademark Office
- Series
- US Patent No. 3,989,944
- Date
- November 2, 1976
- Library no.
- ACL Doc 23302 · asbestosclaims.law/library/23302
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, May 1978, in its patents department (the year's issues)
Cited on this site
Cite this document
Laverne S. Birks, Mohammad Fatemi. “Parallel-beam X-ray optics for measuring asbestos (US Patent 3,989,944, 1976).” November 2, 1976. US Patent No. 3,989,944. US Patent and Trademark Office. AsbestosClaims.Law Library, ACL Doc 23302. https://asbestosclaims.law/library/23302.
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