US2430393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced draft hot-air heater
Assignee: Individual
•
Filing: 1941-05-02
•
Granted: 1947-11-04
•
Expires: 1961-05-02
Abstract
No abstract record available.
Inventors
- 👤 Elbert E Elmore
- 👤 Rodolph F Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:43
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065; F24C; F24C1/00; F24C1/14; F24D; F24D5/00; F24D5/02; F24D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-03 | 1951-05-05 | 1951-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-03 | 1955-05-05 | 1955-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-03 | 1959-05-05 | 1959-11-04 | $7700.00 | Window Closed / Lapsed |