US3077190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar water heating apparatus
Assignee: Individual
•
Filing: 1957-07-22
•
Granted: 1963-02-12
•
Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Naomi B Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/14; F; F24; F24S; F24S10/00; F24S10/10; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208; Y02A20/212; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
THAT METHOD OF PROCESSING A LONG, WIDE, SHALLOW FLOWING STREAM OF WATER WHICH COMPRISES FORMING AN OPEN-TOPPED ELONGATED WIDE SHALLOW CHANNEL IN SUBSTANTIALLY LEVEL GROUND, COVERING THE SURFACE OF SAID CHANNEL WITH AN IMPERVIOUS FILM, CONVEYING A SUBSTANTIALLY CONTINUOUSLY FLOWING SHALLOW LAYER OF WATER TO BE PROCESSED ALONG SAID CHANNEL WHILE SUBJECTING THE SAME TO SOLAR HEAT THROUGH A STATIONARY THIN IMPERVIOUS FILM OF FLEXIBLE SHEET
References Cited (Backward Citations)
US1250260A
Cited
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Cited
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Cited
FR763867A
Cited
FR840926A
Cited
US2427262A
Cited
FR994106A
Cited
US2580555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |