US2220742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-to-metal seal
Assignee: General Electric Co
•
Filing: 1938-05-28
•
Granted: 1940-11-05
•
Expires: 1958-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harry L Thorson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/32; C; C03; C03C; C03C27/00; C03C27/02; C03C27/04; C03C27/042; C03C27/044; H01J5/00; H01J5/32; H01J5/40; H01J2893/00; H01J2893/0033; H01J2893/0034; H01J2893/0035
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-11-05 | 1944-05-06 | 1944-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-05 | 1948-05-06 | 1948-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-05 | 1952-05-06 | 1952-11-05 | $7700.00 | Window Closed / Lapsed |