US3922389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for protectively coating magnetic wire
Assignee: Raytheon Co
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Filing: 1974-03-14
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Granted: 1975-11-25
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Expires: 1994-03-14
Abstract
Abstract A method for applying a protective coating on a permalloy plated wire conductor during in-line processing by passing said wire through a bath of thiazole and an inorganic PH stabilizer from the group consisting of borate, benzoate and phosphate salts of sodium and potassium, or combinations thereof, and then passing the coated wire through a heat treatment furnace having a temperature of 300*C to 400*C to expose the coated wire to an air atmosphere at high temperature.
Inventors
- 👤 Emil Toledo
- 👤 Luke Dzwonczyk
- 👤 Rodger Shih-Yah Mo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:58
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; G11B5/722
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A METHOD FOR APPLYING A PROTECTIVE COATING ON MAGNETIC MEMORY WIRE COMPRISING A WIRE CONDUCTOR HAVING A PERMALLOY COATING COMPRISING THE STEPS OF: PASSING SAID WIRE THROUGH AN AQUEOUS ALKALINE SOLUTION COMPRISING AN ORGANIC COROSION INHIBITOR COMPRISING THIZOLE AND AN INORGANIC PH STABILIZER FROM THE GROUP CONSISTING OF BORATE, BENZOATE AND PHOSPHATE SALTS OF SODIUM AND POTASSIUM AND COMBINATIONS THEREOF TO FORM A COATING ON SAID WIRE; AND PASSING SAID COATED WIRE THROUGH A FURNACE HAVING AN AIR ATMOSPHERE THEREIN MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 300*C AND 400*C.
Claim 2
Independent Claim
89 words
A METHOD FOR APPLYING A PROTECTIVE COATING ON MAGNETIC MEMORY WIRE COMPRISING A WIRE CONDUCTOR HAVING A PERMALLOY COATING COMPRISING THE STEPS OF: PASSING SAID WIRE THROUGH AN AQUEOUS ALKALINE SOLUTION COMPRISING AN ORGANIC COROSION INHIBITOR COMPRISING THIZOLE AND AN INORGANIC PH STABILIZER FROM THE GROUP CONSISTING OF BORATE, BENZOATE AND PHOSPHATE SALTS OF SODIUM AND POTASSIUM AND COMBINATIONS THEREOF TO FORM A COATING ON SAID WIRE; AND PASSING SAID COATED WIRE THROUGH A FURNACE HAVING AN AIR ATMOSPHERE THEREIN MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 300*C AND 400*C.
Claim 3
Dependent Claim
34 words
The method in accordance with claim 1 wherein: said step of passing said wire through said furnace produces a black oxide coating on any portions of said wire left uncovered by said protective coating.
Claim 4
Dependent Claim
21 words
A method as set forth in claim 1 wherein: said solution is maintained at a PH value between 8 and 11.
Claim 5
Dependent Claim
19 words
A method as set forth in claim 1 wherein: said furnace is maintained at a temperature of about 350*C.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |