US2490659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heated vacuum still
Assignee: Individual
•
Filing: 1944-04-24
•
Granted: 1949-12-06
•
Expires: 1964-04-24
Abstract
No abstract record available.
Inventors
- 👤 Robert E Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/046; F; F24; F24S; F24S10/00; F24S10/50; F24S10/503; F24S10/504; F24S10/70; C02F2103/00; C02F2103/08; C02F2209/00; C02F2209/42; F24S23/00; F24S23/70; F24S2023/88; F24S70/00; F24S70/60; F24S2070/62; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/138; Y02A20/142; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S159/00; Y10S159/902; Y10S159/903; Y10S203/00; Y10S203/01; Y10S203/18
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |