Patent US2889686A successfully refreshed from Google Patents.
US2889686A
Expired / Lapsed
US
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Gas fractionating system including a vapor lift pump
Assignee: US Philips Corp
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Filing: 1954-06-25
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Granted: 1959-06-09
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Kohler Jacob Willem Laurens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:16
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905; Y10S62/906; Y10S62/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138612A
Cited
US2380029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |