US3220815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bonding glass or ceramic to metal
Assignee: English Electric Co Ltd
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Filing: 1961-04-24
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Granted: 1965-11-30
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Mcmillan Peter William
- 👤 Hodgson Brian Pardam
- 👤 Partridge Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:59
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; C; C03; C03C; C03C10/00; C03C10/0009; C03C10/0018; C03C10/0027; C03C27/00; C03C27/04; C03C27/042; C03C27/046; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B37/00; C04B37/02; C04B37/023; C04B37/026; H01J5/20; H01J5/22; H01J5/26; C04B2235/00; C04B2235/60; C04B2235/604; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6565; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/10; C04B2237/30; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/407; C04B2237/50; C04B2237/52; C04B2237/525; C04B2237/54; C04B2237/62; C04B2237/64; C04B2237/68; C04B2237/70; C04B2237/704; C04B2237/706; C04B2237/76; C04B2237/765; C04B2237/78; C04B2237/84; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041; H01J2893/0043
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A PROCESS FOR FORMING A SEAL BETWEEN A METAL COMPONENT AND A GLASS COMPONENT WHICH COMPRISES (1) FORMING AN ADHERENT OXIDE FILM ON SAID METAL COMPONENT, (2) APPLYING MOLTEN GLASS CAPABLE OF CONTROLLED DEVITRIFICATION TO SAID ADHERENT LAYER OF OXIDE TO FORM SAID GLASS COMPONENT, (3) COOLING SAID MOLTEN GLASS IN CONTACT WITH SAID ADHERENT LAYER OF OXIDE TO A TEMPERATURE AT WHICH THE GLASS IS RIGID BUT WHICH IS ABOVE THE STRAIN POINT OF SAID GLASS, (4) TREATING THE RESULTING ASSEMBLY IN A NONOXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE THE LOWER ANNEALING TEMPERATURE BUT NOT IN EXCESS OF THE DILATOMETRIC TURNOVER TEMPERATURE OF SAID GLASS IN ITS DEVITRIFIED FORM TO DEVITRIFY SAID GLASS, AND (5) COOLING THE RESULTING METAL-DEVITRIFIED GLASS ASSEMBLY SLOWLY TO ROOM TEMPERATURE TO AVOID THERMAL STRESSES THEREIN.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |