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US4148797A
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(N-Substituted pyridyl)-alkyl sulfonic acid betaines as electroplating additives
Assignee: Cilag Chemie Ltd
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Filing: 1978-06-15
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Granted: 1979-04-10
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Expires: 1998-06-15
Abstract
Abstract Novel pyridyl alkyl sulfonic acid betaines useful as additives to nickel electroplating baths.
Inventors
- 👤 Kurt Pluss
- 👤 Bruno R. DeMartin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:07
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/32; C07D213/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A pyridyl alkyl sulfonic acid betaine having the formula: ##STR18## in which the substituent --(CH 2 ) n SO 3 .sup.⊖ is in the 2- or 4-position of the pyridyl ring; n is the integer 1 or 2; and R is a member selected from the group consisting of CH 2 (CH 2 ) x CH 2 SO 3 Na wherein x is the integer 1 or 2; sodium 2-hydroxypropylsulfonate; sodium 2-hydroxybutylsulfonate; and sodium 3-hydroxybutylsulfonate.
Claim 2
Dependent Claim
75 words
A pyridyl alkyl sulfonic acid betaine having the formula: ##STR18## in which the substituent --(CH 2 ) n SO 3 .sup.⊖ is in the 2- or 4-position of the pyridyl ring; n is the integer 1 or 2; and R is a member selected from the group consisting of CH 2 (CH 2 ) x CH 2 SO 3 Na wherein x is the integer 1 or 2; sodium 2-hydroxypropylsulfonate; sodium 2-hydroxybutylsulfonate; and sodium 3-hydroxybutylsulfonate.
Claim 3
Dependent Claim
3 words
2-[N-(3-Na-sulfopropyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
Claim 4
Dependent Claim
3 words
2-[N-(3-Na-sulfopropyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
Claim 5
Dependent Claim
3 words
2-[N-(3-Na-sulfo-2-hydroxypropyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
Claim 6
Dependent Claim
3 words
2-[N-(3-Na-sulfo-2-hydroxypropyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
References Cited (Backward Citations)
US3444056A
Cited
US3862019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |