US2491252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp mount
Assignee: GTE Sylvania Inc
•
Filing: 1948-03-30
•
Granted: 1949-12-13
•
Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Chun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:54
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1600595A
Cited
US1824452A
Cited
US2254857A
Cited
US2233476A
Cited
US2310983A
Cited
US2375808A
Cited
US2395145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |