Patent US2200911A successfully refreshed from Google Patents.
US2200911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed lead-in for cathode-ray tubes and the like
Assignee: Hygrade Sylvania Corp
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Filing: 1938-01-12
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Granted: 1940-05-14
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Expires: 1958-01-12
Abstract
No abstract record available.
Inventors
- 👤 Robert M Bowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:07
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J29/00; H01J29/92; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49147
Claims Analysis
Total Claims: 0
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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) | 1943-05-14 | 1943-11-13 | 1944-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-14 | 1947-11-13 | 1948-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-14 | 1951-11-13 | 1952-05-14 | $7700.00 | Window Closed / Lapsed |