Patent US2919556A successfully refreshed from Google Patents.
US2919556A
Expired / Lapsed
US
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Gas-fractionating system
Assignee: US Philips Corp
•
Filing: 1956-03-27
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Granted: 1960-01-05
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Expires: 1976-03-27
Abstract
No abstract record available.
Inventors
- 👤 Mulder Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:23
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; B; B01; B01D; B01D3/00; B01D3/42; F25J3/044; F25J2200/00; F25J2200/72; F25J2270/00; F25J2270/90; F25J2270/908; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905; Y10S62/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2127004A
Cited
US2236966A
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US2541409A
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US2650482A
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US2619814A
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US2764536A
Cited
US2762208A
Cited
US2799141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |