US2432136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for concentrating aqueous solutions of hygroscopic liquids
Assignee: Pan American Refining Corp
•
Filing: 1942-07-27
•
Granted: 1947-12-09
•
Expires: 1962-07-27
Abstract
No abstract record available.
Inventors
- 👤 John W Bertetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:35
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/88; Y; Y10; Y10S; Y10S159/00; Y10S159/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2247152A
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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) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |