Patent US6369039B1 successfully refreshed from Google Patents.
US2048656A
Expired / Lapsed
US
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Method of and apparatus for obtaining carbon dioxide
Assignee: Liquid Carbonic Corp
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Filing: 1931-11-18
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Granted: 1936-07-21
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Expires: 1951-11-18
Abstract
No abstract record available.
Inventors
- 👤 Franklin B Hunt
- 👤 Robert L Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; C; C01; C01B; C01B32/00; C01B32/50; Y; Y02; Y02C; Y02C20/00; Y02C20/40
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) | 1939-07-21 | 1940-01-20 | 1940-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-21 | 1944-01-20 | 1944-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-21 | 1948-01-20 | 1948-07-21 | $7700.00 | Window Closed / Lapsed |