US1932903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for liquefying gases
Assignee: Individual
•
Filing: 1927-11-17
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Granted: 1933-10-31
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Expires: 1947-11-17
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:00
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0266; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; F25J2200/00; F25J2200/02; F25J2200/80; F25J2205/00; F25J2205/50; F25J2220/00; F25J2220/80; F25J2220/84; F25J2270/00; F25J2270/90; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
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) | 1936-10-30 | 1937-05-01 | 1937-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-30 | 1941-05-01 | 1941-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-30 | 1945-05-01 | 1945-10-31 | $7700.00 | Window Closed / Lapsed |