US3434940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making thin-film temperature sensors
Assignee: McDonnell Douglas Corp
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Filing: 1966-07-21
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Granted: 1969-03-25
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Expires: 1986-07-21
Abstract
No abstract record available.
Inventors
- 👤 Earl J Brown
- 👤 James R Crowder
- 👤 Raymond O Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:43
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR MAKING A THIN-FILM SENSOR ELEMENT WHICH COMPRISES THE FOLLOWING STEPS: DEPOSITING AN ETCHABLE METALLIC LAYER ONTO AN ELECTRICALLY AND CHEMICALLY INERT SUBSTRATE; REMOVING AN AREA OF THE METALLIC LAYER CORRESPONDING TO THE SHAPE OF THE SENSOR ELEMENT TO BE MADE; APPLYING A LAYER OF AN ADHESIVE MATERIAL OVER THE SHAPED AREA ON THE SUBSTRATE; DEPOSITING A THIN-FILM LAYER OF A NICKEL-IRON ALLOY INTO THE SHAPED AREA AND UPON THE LAYER OF ADHESIVE MATERIAL; SELECTIVELY PLATING A NOBLE METAL ON THE NICKEL-IRON ALLOY LAYER TO DEFINE CONDUCTORS; AND REMOVING UNWANTED PORTIONS OF THE ETCHABLE METALLIC LAYER. ADHESIVE MATERIAL AND NICKEL-IRON ALLOY LAYER AND PASSIVATING THE COMPLETE ASSEMBLY.
Claim 2
Dependent Claim
109 words
A PROCESS FOR MAKING A THIN-FILM SENSOR ELEMENT WHICH COMPRISES THE FOLLOWING STEPS: DEPOSITING AN ETCHABLE METALLIC LAYER ONTO AN ELECTRICALLY AND CHEMICALLY INERT SUBSTRATE; REMOVING AN AREA OF THE METALLIC LAYER CORRESPONDING TO THE SHAPE OF THE SENSOR ELEMENT TO BE MADE; APPLYING A LAYER OF AN ADHESIVE MATERIAL OVER THE SHAPED AREA ON THE SUBSTRATE; DEPOSITING A THIN-FILM LAYER OF A NICKEL-IRON ALLOY INTO THE SHAPED AREA AND UPON THE LAYER OF ADHESIVE MATERIAL; SELECTIVELY PLATING A NOBLE METAL ON THE NICKEL-IRON ALLOY LAYER TO DEFINE CONDUCTORS; AND REMOVING UNWANTED PORTIONS OF THE ETCHABLE METALLIC LAYER. ADHESIVE MATERIAL AND NICKEL-IRON ALLOY LAYER AND PASSIVATING THE COMPLETE ASSEMBLY.
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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |