US2495414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter for electrically heated drapes
Assignee: ELECTRIC HEAT DEVICES Inc
•
Filing: 1948-10-06
•
Granted: 1950-01-24
•
Expires: 1968-10-06
Abstract
No abstract record available.
Inventors
- 👤 Herrington Lovic Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/017; H05B2203/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1841347A
Cited
US2165970A
Cited
US2132263A
Cited
US2138736A
Cited
US2274840A
Cited
US2379580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |