US2513901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double effect salt-water still
Assignee: DAVIS ENGINEERING Corp
•
Filing: 1946-11-05
•
Granted: 1950-07-04
•
Expires: 1966-11-05
Abstract
No abstract record available.
Inventors
- 👤 William H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:48
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; Y; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US982505A
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US1045023A
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USRE21129E
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US2165044A
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US2314152A
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US2374519A
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US2388599A
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US2388773A
Cited
US2378350A
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US2398068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |