US2914428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of hard metallic films
Assignee: RUCKELSHAUS
•
Filing: 1953-11-09
•
Granted: 1959-11-24
•
Expires: 1973-11-09
Abstract
No abstract record available.
Inventors
- 👤 John G Ruckelshaus
- 👤 Roland D Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:10
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/06; C03C17/09; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/263; C03C2218/00; C03C2218/10; C03C2218/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A METHOD OF MANUFACTURING ALLOY RESISTANCE FILMS TO MAKE A "HARD FILM" BONDED BY METALLIC OXIDES OF THAT FILM IN AND ON A GLAZED CERAMIC THAT THEY RESIST ABRASION OF SLIDING CONTACTS, COMPRISING SUBLIMING IN A VACUUM SAID FILM AT A TEMPERATURE AT LEAST FROM 100*C, BELOW THE MELTING POINT OF THE ALLOW VAPOR STRIKING THE GLAZED CERAMIC WHOSE SURFACE TEMPERATURE DURING THE DEPOSITION PROCESS IS IN EXCESS OF 350*C, TO THE MELTING POINT OF THE GLASS, AND DURING SAID SUBLINATION FORMING METAL ALLOY OXIDES THEREON, SAID ALLOY OXIDES BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE AND CHROME OXIDE, USING A NICKEL CHROMIUM ALLOY FILAMENT HAVING LESS THAN 0.2% ALUMINUM, THEN BONDING SAID CERAMIC SURFACE WITH ALLOY FILM, SAID CERAMIC HAVING BEEN PREHEATED TO CAUSE IT TO ABSORB OXYGEN WHICH, UNDER THE HEAT OF EVAPORATION, DIFFUSES THROUGH THE GLASS TO FORM OXIDES OF THE ALLOY VAPOR WHICH IN TURN DISSOLVE INTO THE GLASS AND THE ALLOY FILM.
Claim 2
Independent Claim
159 words
A METHOD OF MANUFACTURING ALLOY RESISTANCE FILMS TO MAKE A "HARD FILM" BONDED BY METALLIC OXIDES OF THAT FILM IN AND ON A GLAZED CERAMIC THAT THEY RESIST ABRASION OF SLIDING CONTACTS, COMPRISING SUBLIMING IN A VACUUM SAID FILM AT A TEMPERATURE AT LEAST FROM 100*C, BELOW THE MELTING POINT OF THE ALLOW VAPOR STRIKING THE GLAZED CERAMIC WHOSE SURFACE TEMPERATURE DURING THE DEPOSITION PROCESS IS IN EXCESS OF 350*C, TO THE MELTING POINT OF THE GLASS, AND DURING SAID SUBLINATION FORMING METAL ALLOY OXIDES THEREON, SAID ALLOY OXIDES BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE AND CHROME OXIDE, USING A NICKEL CHROMIUM ALLOY FILAMENT HAVING LESS THAN 0.2% ALUMINUM, THEN BONDING SAID CERAMIC SURFACE WITH ALLOY FILM, SAID CERAMIC HAVING BEEN PREHEATED TO CAUSE IT TO ABSORB OXYGEN WHICH, UNDER THE HEAT OF EVAPORATION, DIFFUSES THROUGH THE GLASS TO FORM OXIDES OF THE ALLOY VAPOR WHICH IN TURN DISSOLVE INTO THE GLASS AND THE ALLOY FILM.
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |