US1880938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for utilizing solar heat
Assignee: Individual
•
Filing: 1929-08-19
•
Granted: 1932-10-04
•
Expires: 1949-08-19
Abstract
No abstract record available.
Inventors
- 👤 William L R Emmet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S23/00; F24S23/70; F24S23/79; 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) | 1935-10-04 | 1936-04-04 | 1936-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-04 | 1940-04-04 | 1940-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-04 | 1944-04-04 | 1944-10-04 | $7700.00 | Window Closed / Lapsed |