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US4769479A
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Hydroxyphenylpropionic acid ester with novel crystalline structure and production thereof
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-05-30
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Granted: 1988-09-06
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Expires: 2006-05-30
Abstract
Abstract 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy]-1,1-dimethylethyl}-2,4,8,10-tetraoxaspiro[5.5] undecane having a novel crystalline structure which, when subjected to Cu-K.sub.α X-ray diffraction, shows sharp X-ray diffraction peaks at angles of diffraction, 2θ=4.2° and 2θ=10.6°. Also provided is a method for producing this compound.
Inventors
- 👤 Manji Sasaki
- 👤 Chinehito Ebina
- 👤 Haruki Okamura
- 👤 Shinichi Yachigo
- 👤 Tamaki Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:24
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
Hydroxyphenylpropionic acid ester represented by the structural formula ##STR3## having a crystalline structure which, when subjected to Cu-K.sub.α X-ray diffraction, shows sharp X-ray diffraction peaks at angles of diffraction, 2θ=4.2° and 2θ=10.6° and having a melting point in the range of from about 124° C. to about 127° C.
Claim 2
Dependent Claim
49 words
Hydroxyphenylpropionic acid ester represented by the structural formula ##STR3## having a crystalline structure which, when subjected to Cu-K.sub.α X-ray diffraction, shows sharp X-ray diffraction peaks at angles of diffraction, 2θ=4.2° and 2θ=10.6° and having a melting point in the range of from about 124° C. to about 127° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |