US1961203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating mixed gases by selective liquefaction
Assignee: Individual
•
Filing: 1932-08-30
•
Granted: 1934-06-05
•
Expires: 1952-08-30
Abstract
No abstract record available.
Inventors
- 👤 Baufre William Lane De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903; Y10S62/904
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) | 1937-06-04 | 1937-12-04 | 1938-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-04 | 1941-12-04 | 1942-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-04 | 1945-12-04 | 1946-06-05 | $7700.00 | Window Closed / Lapsed |