US1970299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure process for separating low boiling gas mixtures
Assignee: AMERICAN OXYTHERMIC Corp
•
Filing: 1930-03-19
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Granted: 1934-08-14
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Expires: 1950-03-19
Abstract
No abstract record available.
Inventors
- 👤 Frankl Mathias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:07
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J5/00; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905
Claims Analysis
Total Claims: 0
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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) | 1937-08-13 | 1938-02-12 | 1938-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-13 | 1942-02-12 | 1942-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-13 | 1946-02-12 | 1946-08-14 | $7700.00 | Window Closed / Lapsed |