Patent US2049152A successfully refreshed from Google Patents.
US2049152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base for tubes, lamps and the like
Assignee: Hygrade Sylvania Corp
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Filing: 1935-05-29
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Granted: 1936-07-28
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Expires: 1955-05-29
Abstract
No abstract record available.
Inventors
- 👤 Biggs Orrick Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:58
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54
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) | 1939-07-28 | 1940-01-27 | 1940-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-28 | 1944-01-27 | 1944-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-28 | 1948-01-27 | 1948-07-28 | $7700.00 | Window Closed / Lapsed |