US1853743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of mixtures of gases
Assignee: Individual
•
Filing: 1928-09-18
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Granted: 1932-04-12
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Expires: 1948-09-18
Abstract
No abstract record available.
Inventors
- 👤 Pollitzer Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; F25J3/0204; F25J3/0219; F25J3/0233; F25J3/0242; F25J2200/00; F25J2200/50; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/60; F25J2215/62; F25J2215/64; F25J2270/00; F25J2270/12; F25J2270/18; F25J2270/66
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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |