INFRA-RED ANALYSIS OF DIAMONDS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
Apr 23, 2015
app pub date -
Jun 12, 2013
filing date -
Jun 15, 2012
priority date (Note) -
Published
status (Latency Note)
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Importance

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Non-US Coverage
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Abstract
The invention provides a method of automating the classification of a diamond gemstone. An infra-red absorption spectrum of the gemstone is provided. Features corresponding to absorption by water and intrinsic absorption by a diamond lattice are subtracted from the absorption spectrum. The spectrum is analysed to identify predetermined absorption features corresponding to lattice defects in the diamond. The gemstone is classified according to the intensities of the predetermined absorption features. The results of the classification are saved in a database.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
DE BEERS UK LTD | 20 CARLTON HOUSE TERRACE LONDON SW1Y 5AN |
International Classification(s)

- 2013 Application Filing Year
- G01N Class
- 9056 Applications Filed
- 7640 Patents Issued To-Date
- 84.37 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Davies, Nicholas Matthew | Berkshire, GB | 5 | 28 |
# of filed Patents : 5 Total Citations : 28 | |||
Fisher, David | Berkshire, GB | 91 | 1345 |
# of filed Patents : 91 Total Citations : 1345 | |||
Khan, Rizwan | London, GB | 5 | 13 |
# of filed Patents : 5 Total Citations : 13 | |||
Smith, James Gordon Charters | Buckinghamshire, GB | 19 | 197 |
# of filed Patents : 19 Total Citations : 197 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 1 Citation Count
- G01N Class
- 23.45 % this patent is cited more than
- 10 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 23, 2026 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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