US2820744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating solar still
Assignee: Individual
•
Filing: 1956-11-05
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Granted: 1958-01-21
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Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 Lighter Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/18; B; B01; B01D; B01D5/00; B01D5/0057; B01D5/006; B01D5/0066; C02F1/14; F; F24; F24S; F24S10/00; F24S10/10; F24S10/17; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/138; Y02A20/142; Y02A20/20; Y02A20/208; Y02A20/212; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S203/00; Y10S203/01; Y10S203/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
IN A SOLAR STILL, AN IMPERFORATE DOME SHAPED BUOYANT OUTER CASING HAVING A CONTINUOUS ANNULAR SIDE WALL SPANNED AT ITS UPPER END BY AN UPWARDLY CONVEX TOP ENCLOSURE, A CONTINUOUS INNER ANNULAR WALL WITHIN SAID CASING SIDE WALL AND COATING THEREWITH TO PROVIDE AN UPWARDLY OPEN TROUGH BETWEEN SAID WALLS, SAID INNER WALL HAVING AN OPEN LOWER END COMMUNICATING WITH THE AMBIENT ATMOSPHERE AND AN OPEN UPPER END SPACED FROM SAID TOP ENCLOSURE TO FORM A LIQUID SEALED CONDENSING CHAMBER COMMUNICATING WITH SAID TROUGH, A LIQUID PERVIOUS BARRIER SPANNING THE INTERIOR OF SAID INNER WALL, AND
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |