US1804432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of fractionating, cooling, and condensing gas mixtures
Assignee: Individual
•
Filing: 1924-05-10
•
Granted: 1931-05-12
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Expires: 1944-05-10
Abstract
No abstract record available.
Inventors
- 👤 Pollitzer Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:06
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/063; F25J3/0635; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0252; F25J3/0605; F25J3/062; F25J3/0655; F25J2200/00; F25J2200/02; F25J2200/70; F25J2205/00; F25J2205/50; F25J2210/00; F25J2210/04; F25J2210/14; F25J2220/00; F25J2220/60; F25J2220/66; F25J2235/00; F25J2235/60; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/02
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) | 1934-05-11 | 1934-11-10 | 1935-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-11 | 1938-11-10 | 1939-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-11 | 1942-11-10 | 1943-05-12 | $7700.00 | Window Closed / Lapsed |