US3739456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a sacrificial anode
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1971-04-30
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Granted: 1973-06-19
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Expires: 1991-04-30
Abstract
Abstract The present invention is directed to an improved method for protecting ferrous pipe from corrosion and comprises affixing in intimate contact with said pipe a length of magnesium tubing. The magnesium tubing, having sacrificial anode properties, is slipped over a length of ferrous pipe while at an elevated temperature. The tubing is then compressed by external pressure until it is in intimate contact with the ferrous pipe throughout its length and it is allowed to cool in place.
Inventors
- 👤 J Scherer
- 👤 L Taggart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:18
CPC Classifications
B; B23; B23P; B23P11/00; B23P11/02; B23P11/025; Y; Y10; Y10S; Y10S138/00; Y10S138/06; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49908; Y10T29/49925; Y10T29/49927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |