US3672036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making assemblies of stainless steel tubing
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1969-02-26
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Granted: 1972-06-27
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Expires: 1989-02-26
Abstract
Abstract A method of making assemblies of stainless steel tubing or piping and conventional plumbing fittings which comprises coating stainless steel tubing, at least at the ends thereof, with copper, tin or alloys thereof and joining a fitting coated portion by soldering.
Inventors
- 👤 John P Ziemianski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:05
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; F; F16; F16L; F16L13/00; F16L13/08; F16L9/00; F16L9/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A method according to claim 1 wherein said coating metal is copper and is applied to said stainless steel tube by electroplating said stainless tube to a thickness of 0.0001 to 0.0003 inches of electrodeposited copper.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |