US2543093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: Tung Sol Lamp Works Inc
•
Filing: 1948-12-28
•
Granted: 1951-02-27
•
Expires: 1968-12-28
Abstract
No abstract record available.
Inventors
- 👤 Reginald K Braunsdorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/36; H01K1/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US770222A
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US1427870A
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US1861167A
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US2030187A
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US2074864A
Cited
US2114350A
Cited
US2366319A
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US2362173A
Cited
US2362171A
Cited
US2464990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |