US2582830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature regulation of air heaters
Assignee: Riley Power Inc
•
Filing: 1946-01-21
•
Granted: 1952-01-15
•
Expires: 1966-01-21
Abstract
No abstract record available.
Inventors
- 👤 Charles F Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
F; F23; F23L; F23L15/00; F23L15/04; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10S; Y10S122/00; Y10S122/01; Y10S165/00; Y10S165/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |