US2527013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared heater
Assignee: Individual
•
Filing: 1947-10-17
•
Granted: 1950-10-24
•
Expires: 1967-10-17
Abstract
No abstract record available.
Inventors
- 👤 Bayard L Kjelgaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:27
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318237A
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US1227324A
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US1705812A
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US1754232A
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US1694351A
Cited
US1713013A
Cited
US1782825A
Cited
US2042264A
Cited
US2379820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |