US3421332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flushing with residual uncondensed gas mixture after vacuum removal of condensed components
Assignee: Linde GmbH
•
Filing: 1964-12-14
•
Granted: 1969-01-14
•
Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
F; F25; F25J; F25J5/00; B; B01; B01D; B01D53/00; B01D53/002; B01D2258/00; B01D2258/02; B01D2258/025; F25J2210/00; F25J2210/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107335A
Cited
DE725157C
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US3091093A
Cited
US2981082A
Cited
US3073128A
Cited
GB894558A
Cited
US3063247A
Cited
US3216206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |