Patent US2990914A successfully refreshed from Google Patents.
US2990914A
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Absorption system
Assignee: Lummus Technology LLC
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Filing: 1958-09-22
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Granted: 1961-07-04
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Expires: 1978-09-22
Abstract
No abstract record available.
Inventors
- 👤 Kniel Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:50
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1487; B01D53/18; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J2205/00; F25J2205/02; F25J2205/50; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2270/00; F25J2270/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |