US2213894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar water heater
Assignee: ERVIN T BROWN
•
Filing: 1938-10-24
•
Granted: 1940-09-03
•
Expires: 1958-10-24
Abstract
No abstract record available.
Inventors
- 👤 Edward J Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/70; F24S10/74; F24S10/744; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S203/00; Y10S203/01
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) | 1943-09-03 | 1944-03-04 | 1944-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-03 | 1948-03-04 | 1948-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-03 | 1952-03-04 | 1952-09-03 | $7700.00 | Window Closed / Lapsed |