US2768475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making glass-to-metal seal
Assignee: RCA Corp
•
Filing: 1952-11-28
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Granted: 1956-10-30
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Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Harry R Seelen
- 👤 Willard E Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:25
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/663; E06B3/66309; E06B3/66342; E06B3/66357; E06B3/66347; H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J9/00; H01J9/24; H01J9/26; H01J9/263; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041; H01J2893/0043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122453A
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GB578580A
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US2625717A
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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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |