US2464990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp manufacture
Assignee: Westinghouse Electric Corp
•
Filing: 1945-08-28
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Granted: 1949-03-22
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Expires: 1965-08-28
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Plagge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:03
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/12; 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)
US488635A
Cited
US1861167A
Cited
US2148314A
Cited
US2148315A
Cited
US2362171A
Cited
US2398968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |