Patent US1989999A successfully refreshed from Google Patents.
US1989999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar water heater
Assignee: Individual
•
Filing: 1933-06-07
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Granted: 1935-02-05
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Expires: 1953-06-07
Abstract
No abstract record available.
Inventors
- 👤 Niederle Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:23
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S20/00; F24S20/20; F24S23/00; 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) | 1938-02-04 | 1938-08-06 | 1939-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-04 | 1942-08-06 | 1943-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-04 | 1946-08-06 | 1947-02-05 | $7700.00 | Window Closed / Lapsed |