US3632008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indium alloy seal and cathode-ray tube envelope employing such seal
Assignee: Tektronix Inc
•
Filing: 1969-10-15
•
Granted: 1972-01-04
•
Expires: 1989-10-15
Abstract
Abstract A hermetic seal between a crystalline ceramic member and a member of inorganic, nonmetallic material, such as glass, ceramic or semiconductor material, is described which is formed by an alloy of indium and an active metal, such as titanium, zirconium, tantalum and hafnium. In one embodiment, an envelope for a cathode-ray tube is formed by sealing a glass faceplate to a ceramic funnel portion by the indium alloy seal. As a result of the short time required for such sealing, the cathode ray tube envelope may be first evacuated and then sealed during the same heating cycle so that such evacuation can be performed through the large end of the envelope at such faceplate.
Inventors
- 👤 Roger S Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:01
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/863; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; H01J9/00; H01J9/24; H01J9/26; H01J9/263; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/62; C04B2237/70; C04B2237/706; C04B2237/72; C04B2237/76; C04B2237/765
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
An apparatus in accordance with claim 1 in which the alloy includes a wetting metal selected from the group consisting of gold, silver, nickel and copper.
Claim 2
Dependent Claim
18 words
An apparatus in accordance with claim 1 in which the other member is also made of crystalline ceramic.
Claim 3
Dependent Claim
16 words
An apparatus in accordance with claim 1 in which the other member is made of glass.
Claim 4
Dependent Claim
17 words
An apparatus in accordance with claim 1 in which the other member is made of semiconductor material.
Claim 5
Dependent Claim
54 words
An apparatus in accordance with claim 1 in which the one member is a ceramic funnel portion and the other member is a light transparent glass faceplate portion of an envelope for a cathode-ray tube, and the seal is an annular, hermetic seal between one end of said funnel portion and said faceplate portion.
Claim 6
Dependent Claim
27 words
An apparatus in accordance with claim 6 in which the faceplate is a flat, glass plate having a layer of phosphor material provided on its inner surface.
Claim 7
Dependent Claim
34 words
An apparatus in accordance with claim 7 in which a light transparent, conductive film is applied to the faceplate beneath the phosphor layer and extends through the seal to the exterior of the envelope.
References Cited (Backward Citations)
CA587622A
Cited
US2464990A
Cited
US2746140A
Cited
GB800519A
Cited
US2979813A
Cited
US3131460A
Cited
US3252722A
Cited
US3207936A
Cited
US3235943A
Cited
US3243627A
Cited
US3490890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |