US2689924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric incandescent lamp
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-01-25
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Granted: 1954-09-21
•
Expires: 1971-01-25
Abstract
No abstract record available.
Inventors
- 👤 Honing Wilhelm
- 👤 Siebelink Herman Bernard
- 👤 Wijnberg Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:27
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/38; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0038; H01J2893/0039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2464990A
Cited
US2490776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |