US2222828A
Expired / Lapsed
US
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Means for operating upon one or more constituents of a gaseous medium by adsorption
Assignee: PEOPLES GAS BY PRODUCTS CORP
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Filing: 1937-03-31
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Granted: 1940-11-26
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Expires: 1957-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert G Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0438; B01D53/06; B01D53/26; B01D53/261; B01D2253/00; B01D2253/10; B01D2253/106; B01D2257/00; B01D2257/70; B01D2257/708; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D2259/40092; B01D2259/402; B01D2259/41; B01D53/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-11-26 | 1944-05-27 | 1944-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-26 | 1948-05-27 | 1948-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-26 | 1952-05-27 | 1952-11-26 | $7700.00 | Window Closed / Lapsed |