US3404968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-to-metal seals and method for making same
Assignee: Westinghouse Electric Corp
•
Filing: 1964-09-30
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Granted: 1968-10-08
•
Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Rohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12583; Y10T428/1259; Y10T428/12597; Y10T428/12771; Y10T428/12778
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A GLASS-TO-METAL SEAL COMPRISING A GLASS MEMBER, A METAL MEMBER SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN FERROUS METALS, AND ALLOYS THEREOF, A FIRST LAYER OF AN ALLOY OF CHROMIUM AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NICKEL, IRON AND COBALT, AND A SECOND LAYER OF CHROMIUM OXIDE DISPOSED UPON SAID FIRST LAYER, SAID SECOND LAYER BEING BONDED TO SAID GLASS MEMBER.
Claim 2
Dependent Claim
65 words
A GLASS-TO-METAL SEAL COMPRISING A GLASS MEMBER, A METAL MEMBER SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN FERROUS METALS, AND ALLOYS THEREOF, A FIRST LAYER OF AN ALLOY OF CHROMIUM AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NICKEL, IRON AND COBALT, AND A SECOND LAYER OF CHROMIUM OXIDE DISPOSED UPON SAID FIRST LAYER, SAID SECOND LAYER BEING BONDED TO SAID GLASS MEMBER.
References Cited (Backward Citations)
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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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |