US2213338A
Expired / Lapsed
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Method and apparatus for fractionating gaseous mixtures
Assignee: Individual
•
Filing: 1937-01-02
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Granted: 1940-09-03
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Expires: 1957-01-02
Abstract
No abstract record available.
Inventors
- 👤 Baufre William Lane De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:55
CPC Classifications
C; C10; C10G; C10G5/00; C10G5/06; B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; B01D5/00; B01D5/0033; B01D5/0036; B01D5/0039; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J2200/00; F25J2200/02; F25J2200/50; F25J2200/74; F25J2200/78; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2230/00; F25J2230/60; F25J2270/00; F25J2270/02; F25J2290/00; F25J2290/42
Claims Analysis
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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) | 1943-09-03 | 1944-03-04 | 1944-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-03 | 1948-03-04 | 1948-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-03 | 1952-03-04 | 1952-09-03 | $7700.00 | Window Closed / Lapsed |