Synthetic bone ash
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 23, 1981
Issued Date -
N/A
app pub date -
Jun 3, 1980
filing date -
Mar 5, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Hydroxyapatite suitable for incorporation as a synthetic bone ash in a 'bone' china body is produced by continuously contacting a stream of a slurry of hydrated lime with a stream of at least about 60% by weight phosphoric acid at an approximately stoichiometric ratio of 10 Ca(OH).sub.2 to 6 H.sub.3 PO.sub.4 and a temperature of from about 80.degree. to about 85.degree. C. at a controlled reaction mixture of pH of from about 9.0 to about 11.0 and then calcining at a temperature of at least 1,000.degree. C.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
TATE & LYLE LIMITED | SUGAR QUAY LOWER THAMES ST LONDON EC3R 6DQ |
International Classification(s)

- 1980 Application Filing Year
- C01B Class
- 406 Applications Filed
- 1 Patents Issued To-Date
- 0.25 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Irvine, George D | Greenock, GB6 | 1 | 21 |
# of filed Patents : 1 Total Citations : 21 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 21 Citation Count
- C01B Class
- 0 % this patent is cited more than
- 44 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jun 23, 1981 | I | Issuance | |
Mar 20, 1981 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jan 29, 1981 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BRITISH CHARCOALS & MC DONALDS LIMITED;REEL/FRAME:003827/0696 Owner name: TATE & LYLE LIMITED, SUGAR QUAY, LOWER THAMES STRE Effective Date: Jan 29, 1981 |
Jun 03, 1980 | F | Filing | |
Mar 05, 1979 | PD | Priority Date |

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