US4169950A
Expired / Lapsed
US
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Amino-hydroxy-alkyl sulfonic acid zwitterions
Assignee: Research Organics LLC
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Filing: 1977-12-08
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Granted: 1979-10-02
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Expires: 1997-12-08
Abstract
Abstract Novel amino-hydroxy-alkylene sulfonic acid zwitterions are described which have the general formulas ##STR1## wherein A and B are each independently a hydrogen atom, an aliphatic, cycloaliphatic or hydroxyaliphatic group, N is one or two, and R═n is a cyclic radical comprising one or two ring nitrogen atoms, zero or one ring oxygen atoms and the remainder of the ring being carbon atoms, and water soluble salts of said acids. These organo-sulfonic acid compounds are useful as hydrogen ion buffers in biological research and particularly for tissue culture.
Inventors
- 👤 Wilfred J. Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:22
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
33 words
A morpholinyl hydroxyalkalene sulfonic acid having the formula ##STR7## wherein R 2 is a hydrogen atom, an alkyl or a hydroxyalkyl group containing up to about 5 carbon atoms in the alkyl group.
Claim 2
Dependent Claim
33 words
A morpholinyl hydroxyalkalene sulfonic acid having the formula ##STR7## wherein R 2 is a hydrogen atom, an alkyl or a hydroxyalkyl group containing up to about 5 carbon atoms in the alkyl group.
Claim 3
Dependent Claim
12 words
The acid of claim 1 wherein R 2 is a hydrogen atom.
Claim 4
Dependent Claim
30 words
An amino sulfonic acid having the general formula ##STR8## wherein R 3 is the group ##STR9## and R 4 is the same as R 3 or is a hydroxyethyl group.
Claim 5
Dependent Claim
30 words
An amino sulfonic acid having the general formula ##STR8## wherein R 3 is the group ##STR9## and R 4 is the same as R 3 or is a hydroxyethyl group.
Claim 6
Dependent Claim
15 words
The acid of claim 3 wherein R 4 is the same as R 3 .
Claim 7
Dependent Claim
12 words
The acid of claim 3 wherein R 4 is a hydroxyethyl group.
Claim 8
Dependent Claim
44 words
Amino sulfonic acid compounds having the general formula ##STR10## wherein R 1 is a hydrogen atom, an alkyl or hydroxyalkyl group containing up to about five carbon atoms, or --(CH 2 ) n --CH(OH)--CH 2 SO 3 H, and n is 1 or 2.
Claim 9
Dependent Claim
44 words
Amino sulfonic acid compounds having the general formula ##STR10## wherein R 1 is a hydrogen atom, an alkyl or hydroxyalkyl group containing up to about five carbon atoms, or --(CH 2 ) n --CH(OH)--CH 2 SO 3 H, and n is 1 or 2.
Claim 10
Dependent Claim
12 words
The compound of claim 6 wherein R 1 is a hydroxyalkyl group.
References Cited (Backward Citations)
US2109401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |