Patent US2990494A successfully refreshed from Google Patents.
US2990494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: Individual
•
Filing: 1959-07-10
•
Granted: 1961-06-27
•
Expires: 1979-07-10
Abstract
No abstract record available.
Inventors
- 👤 Liberman Milton
- 👤 Liberman Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:22
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/04; F21V7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US520649A
Cited
US687943A
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US775689A
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US1353916A
Cited
US1609220A
Cited
US2088544A
Cited
US2163272A
Cited
US2257366A
Cited
GB800350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |