US2730875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of operating regenerator pairs in gas separating installations
Assignee: Linde GmbH
•
Filing: 1951-11-07
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Granted: 1956-01-17
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Expires: 1971-11-07
Abstract
No abstract record available.
Inventors
- 👤 Ranke Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
F; F25; F25J; F25J5/00; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1890646A
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US1948779A
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US2084987A
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US2138685A
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US2677252A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |