US1853480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar water heater
Assignee: FRANK J BENTZ
•
Filing: 1929-05-07
•
Granted: 1932-04-12
•
Expires: 1949-05-07
Abstract
No abstract record available.
Inventors
- 👤 Henry A Wheeler
- 👤 Frank J Bentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/70; F24S10/74; F24S10/748; F24S50/00; F24S50/40; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |