US4246194A
Expired / Lapsed
US
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Amino-hydroxy-alkyl sulfonic acid-zwitterions
Assignee: Research Organics LLC
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Filing: 1979-08-27
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Granted: 1981-01-20
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Expires: 1999-08-27
Abstract
Abstract Novel amino-hydroxy-alkylene sulfonic acid zwitterions are described which have the general formulas <IMAGE> (FORMULA I) <IMAGE> (FORMULA II) 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
2026-11-01 23:56
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
Amino sulfonic acid compounds having the general formula ##STR7## wherein A and B are each independently a hydrogen atom or hydroxy aliphatic group containing up to four carbon atoms, and n is 1 or 2.
Claim 2
Dependent Claim
35 words
Amino sulfonic acid compounds having the general formula ##STR7## wherein A and B are each independently a hydrogen atom or hydroxy aliphatic group containing up to four carbon atoms, and n is 1 or 2.
Claim 3
Dependent Claim
15 words
The compound of claim 1 wherein A is hydrogen and B is a hydroxyaliphatic group.
Claim 4
Dependent Claim
12 words
The compound of claim 1 wherein A and B are hydroxyalkyl groups.
Claim 5
Dependent Claim
12 words
The compound of claim 3 wherein A and B are hydroxyethyl groups.
References Cited (Backward Citations)
US1944300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |