US2790248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for regenerating adsorbent beds
Assignee: United Gas Corp
•
Filing: 1954-07-29
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Granted: 1957-04-30
•
Expires: 1974-07-29
Abstract
No abstract record available.
Inventors
- 👤 Willard M Dow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:24
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01J; B01J49/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863656A
Cited
US2535902A
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US2520871A
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US2642943A
Cited
US2661808A
Cited
US2562334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |