US2523332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heat device and method
Assignee: Individual
•
Filing: 1945-06-14
•
Granted: 1950-09-26
•
Expires: 1965-06-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Riehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:25
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/12; F24D3/16; F24D2220/00; F24D2220/20; F24D2220/2009; F24D2220/2072; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174714A
Cited
US1365807A
Cited
GB238024A
Cited
US1671568A
Cited
GB366770A
Cited
GB369780A
Cited
FR875412A
Cited
US2382340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |