US1753227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar water-heating system
Assignee: FRANK J BENTZ
•
Filing: 1928-08-22
•
Granted: 1930-04-08
•
Expires: 1948-08-22
Abstract
No abstract record available.
Inventors
- 👤 Henry A Wheeler
- 👤 Frank J Bentz
- 👤 James L Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/70; F24S10/75; F24S10/755; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1933-04-07 | 1933-10-07 | 1934-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-07 | 1937-10-07 | 1938-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-07 | 1941-10-07 | 1942-04-08 | $7700.00 | Window Closed / Lapsed |