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US3985784A Expired / Lapsed US ⏱️ 0.0 years remaining

Thioether sulfonates for use in electroplating baths

Assignee: Oxy Metal Industries Corp
•
Filing: 1975-03-07
•
Granted: 1976-10-12
•
Expires: 1995-03-07
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Abstract

Abstract A composite nickel-containing electroplate is formed on a base metal surface by electroplating on the surface an adherent nickel or nickel alloy layer having a thickness of from about 0.15 to 1.5 mils and an average sulfur content of less than about 0.03%. An intermediate nickel or nickel alloy layer, having a thickness of from about 0.005 to 0.2 mils and an average sulfur content of from about 0.05 to 0.3% is then electroplated on the lower layer. An adherent upper nickel or nickel alloy having a thickness of from about 0.2 to 1.5 mils and average sulfur content of from about 0.02 to 0.15% is then electroplated on the intermediate layer, the upper layer containing a lower percentage of sulfur then the lower layer. The source of sulfur, for at least the intermediate layer, is provided by including novel thioethersulfonates of nitriles or amides in the plating bath for that layer.

Inventors

  • 👤 Richard John Clauss
  • 👤 Robert Arnold Tremmel
  • 👤 Donald Harvey Becking

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 05:38
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 107 words
A thioethersulfonate independently selected from ##EQU1## wherein the following definitions delineate the scope of the above general formula: M = na, K, NH 4 or H; R = an alkylene group containing 2 to 4 carbon atoms; R 1 = h, or alkyl group containing 1 to 4 carbon atoms; R 2 = h, or (CH 2 ) m X; m = 1 - 2 X = -cn, or ##EQU2## R 3 , R 4 = H, or alkyl group containing 1 - 4 carbon atoms; n = 0 to 3 with the proviso that when two X groups are present in the compound they are identical.
Claim 2
Dependent Claim 107 words
A thioethersulfonate independently selected from ##EQU1## wherein the following definitions delineate the scope of the above general formula: M = na, K, NH 4 or H; R = an alkylene group containing 2 to 4 carbon atoms; R 1 = h, or alkyl group containing 1 to 4 carbon atoms; R 2 = h, or (CH 2 ) m X; m = 1 - 2 X = -cn, or ##EQU2## R 3 , R 4 = H, or alkyl group containing 1 - 4 carbon atoms; n = 0 to 3 with the proviso that when two X groups are present in the compound they are identical.
Claim 3
Dependent Claim 11 words
The thioethersulfonate of claim 1, wherein R is three carbon atoms.
Claim 4
Dependent Claim 13 words
The thioethersulfonate of claim 1, wherein R 3 and R 4 are hydrogen.
Claim 5
Dependent Claim 9 words
The thioethersulfonate of claim 1, of the structure: ##STR4##
Claim 6
Dependent Claim 20 words
The thioethersulfonate of claim 1, of the structure: NC -- CH.sub.2 -- CH.sub.2 -- S -- (CH.sub.2).sub.3 -- SO.sub.3 Na
Claim 7
Dependent Claim 9 words
The thioethersulfonate of claim 1, of the structure: ##STR5##
Claim 8
Dependent Claim 9 words
The thioethersulfonate of claim 1, of the structure: ##STR6##

References Cited (Backward Citations)

US2330713A Cited
US2462406A Cited
US2694718A Cited
US3112198A Cited
US3344174A Cited
US3502708A Cited
US3734840A Cited
US3707507A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-10-12 1980-04-12 1980-10-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-10-12 1984-04-12 1984-10-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-10-12 1988-04-12 1988-10-12 $7700.00 Window Closed / Lapsed

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