US2738857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous gas dehumidification
Assignee: ExxonMobil Oil Corp
•
Filing: 1952-10-23
•
Granted: 1956-03-20
•
Expires: 1972-10-23
Abstract
No abstract record available.
Inventors
- 👤 Robert D Drew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1836301A
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US1948779A
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US2359660A
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US2493911A
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US2629460A
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US2549104A
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US2642955A
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US2636575A
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US2638999A
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US2665769A
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US2616515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |