US1575309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heating element
Assignee: Individual
•
Filing: 1924-09-15
•
Granted: 1926-03-02
•
Expires: 1944-09-15
Abstract
No abstract record available.
Inventors
- 👤 William A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:42
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S20/00; F24S20/20; F24S23/00; F24S23/70; F24S23/74; F24S70/00; F24S70/60; F24S80/00; F24S2080/03; F24S2080/05; 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) | 1929-03-01 | 1929-08-31 | 1930-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-01 | 1933-08-31 | 1934-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-01 | 1937-08-31 | 1938-03-02 | $7700.00 | Window Closed / Lapsed |