US3587559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-heating apparatus utilizing solar rays
Assignee: Individual
•
Filing: 1969-05-22
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Granted: 1971-06-28
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Expires: 1989-05-22
Abstract
Abstract AN APPARATUS FOR HEATING WATER BY SOLAR RAYS IN WHICH A PLURALITY OF SPHERICAL LENSES ARE USED TO ENABLE SOLAR RAYS TO BE CONVERGED WHENEVER THERE IS SUNLIGHT PRESENT. ALSO INCORPORATING A SUPERHEAT RESISTING CARBON IMPREGNATED CLOTH TO COVER THAT AREA OF METAL WHICH IS SUBJECTED TO THE INTENSIVE HEAT OF THE FOCUSED RAYS.
Inventors
- 👤 Kenshichi Wonaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:21
CPC Classifications
F; F24; F24S; F24S23/00; F24S23/30; F24S10/00; F24S10/70; F24S10/75; 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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |