US2182222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heater
Assignee: Individual
•
Filing: 1936-11-23
•
Granted: 1939-12-05
•
Expires: 1956-11-23
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Courtis
- 👤 Walter F Courtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:46
CPC Classifications
F; F24; F24S; F24S30/00; F24S30/40; F24S30/45; F24S30/452; F24S20/00; F24S20/20; F24S23/00; F24S23/70; F24S23/74; F24S2030/10; F24S2030/13; F24S2030/134; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-12-04 | 1943-06-05 | 1943-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-04 | 1947-06-05 | 1947-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-04 | 1951-06-05 | 1951-12-05 | $7700.00 | Window Closed / Lapsed |