US4751290A
Expired / Lapsed
US
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Sialosylcerebrosides
Assignee: Mect Corp
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Filing: 1986-06-06
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Granted: 1988-06-14
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Expires: 2006-06-06
Abstract
Abstract This invention provides a novel compound having a formula such as ##STR1## This invention also provides a process for preparing such a compound.
Inventors
- 👤 Tomoya Ogawa
- 👤 Mamoru Sugimoto
- 👤 Masaaki Numata
- 👤 Yoshiyasu Shitori
- 👤 Masayoshi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:34
CPC Classifications
C; C07; C07H; C07H3/00; C07H3/06; C07H15/00; C07H15/02; C07H15/04; C07H15/10; A; A61; A61P; A61P35/00; A61P43/00; C07H13/00; C07H13/02; C07H13/04; C07H13/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A sialosylcerebroside of formula I: ##STR10## wherein R 1 is hydrogen or acetyl, R 2 is --COOR 4 , wherein R 4 is hydrogen, sodium or methyl, and R 3 is ##STR11## wherein R 5 is hydrogen or acetyl, R 6 is --C(CCl 3 )═NH or ##STR12## wherein R 7 is hydrogen or benzoyl, R 11 is a saturated aliphatic hydrocarbon group having 10 to 16 carbon atoms and R 12 is a saturated aliphatic hydrocarbon group having 15 to 25 carbon atoms; or R 2 is ##STR13## wherein R 5 and R 6 have the same meaning as defined above and R 3 is --COOR 4 , wherein R 4 has the same meaning as defined above.
Claim 2
Dependent Claim
118 words
A sialosylcerebroside of formula I: ##STR10## wherein R 1 is hydrogen or acetyl, R 2 is --COOR 4 , wherein R 4 is hydrogen, sodium or methyl, and R 3 is ##STR11## wherein R 5 is hydrogen or acetyl, R 6 is --C(CCl 3 )═NH or ##STR12## wherein R 7 is hydrogen or benzoyl, R 11 is a saturated aliphatic hydrocarbon group having 10 to 16 carbon atoms and R 12 is a saturated aliphatic hydrocarbon group having 15 to 25 carbon atoms; or R 2 is ##STR13## wherein R 5 and R 6 have the same meaning as defined above and R 3 is --COOR 4 , wherein R 4 has the same meaning as defined above.
Claim 3
Dependent Claim
39 words
The sialosylcerebroside of claim 1, wherein R 2 is --COOR 4 , wherein R 4 is hydrogen, sodium or methyl, and R 3 is ##STR14## wherein R 5 is hydrogen or acetyl or R 6 is --C(CCl 3 )═NH.
Claim 4
Dependent Claim
19 words
The sialosylcerebroside of claim 2, wherein R 1 and R 5 are each acetyl and R 4 is methyl.
Claim 5
Dependent Claim
44 words
The sialosylcerebroside of claim 3, wherein R 6 is ##STR15## wherein R 7 is benzoyl, R 11 is a saturated aliphatic hydrocarbon group of 10 to 16 carbon atoms and R 12 is a saturated aliphatic hydrocarbon group of 15 to 25 carbon atoms.
Claim 6
Dependent Claim
39 words
The sialosylcerebroside of claim 2, wherein R 1 , R 4 and R 5 are each hydrogen and R 6 is ##STR16## wherein R 7 is hydrogen, and R 11 and R 12 are as defined in claim 4.
Claim 7
Dependent Claim
39 words
The sialosylcerebroside of claim 1, wherein R 2 is ##STR17## wherein R 5 is hydrogen or acetyl and R 6 is --C(CCl 3 )═NH and R 3 is --COOR 4 , wherein R 4 is hydrogen, sodium or methyl.
Claim 8
Dependent Claim
19 words
The sialosylcerebroside of claim 6, wherein R 1 and R 5 are each acetyl and R 4 is methyl.
Claim 9
Dependent Claim
27 words
The sialosylcerebroside of claim 7, wherein R 6 is ##STR18## wherein R 7 is benzoyl and R 11 and R 12 are as defined in claim 1.
Claim 10
Dependent Claim
39 words
The sialosylcerebroside of claim 6, wherein R 1 , R 4 and R 5 are each hydrogen and R 6 is ##STR19## wherein R 7 is hydrogen and R 11 and R 12 are as defined in claim 1.
References Cited (Backward Citations)
US4495346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |