Patent US2462837A successfully refreshed from Google Patents.
US2462837A
Expired / Lapsed
US
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Incandescent lamp
Assignee: Tung Sol Lamp Works Inc
•
Filing: 1945-10-08
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Granted: 1949-03-01
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Expires: 1965-10-08
Abstract
No abstract record available.
Inventors
- 👤 Reginald K Braunsdorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:18
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/52; H01K1/54; H01K1/56; H01K1/02; H01K1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US596654A
Cited
US2404992A
Cited
GB126441A
Cited
US1859043A
Cited
US1892819A
Cited
US1895855A
Cited
GB520835A
Cited
US2208987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |