Patent US2790510A successfully refreshed from Google Patents.
US2790510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter for lamps
Assignee: Individual
•
Filing: 1954-04-15
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Granted: 1957-04-30
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Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Brabec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:00
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/80; F21; F21V; F21V33/00; F21V33/0088; F24F8/10; F24F8/108; F24F2221/00; F24F2221/02; F24F2221/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1794447A
Cited
US1801506A
Cited
US2044832A
Cited
US2077181A
Cited
US2115541A
Cited
US2209054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |