US2728850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp adapters
Assignee: Individual
•
Filing: 1951-12-29
•
Granted: 1955-12-27
•
Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Sherbinin William N De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563930A
Cited
US586061A
Cited
US603417A
Cited
US713098A
Cited
US729780A
Cited
US737628A
Cited
GB190401116A
Cited
US1704024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |