US2204431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption apparatus and method
Assignee: PITTSBURGH RES CORP
•
Filing: 1936-02-14
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Granted: 1940-06-11
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Expires: 1956-02-14
Abstract
No abstract record available.
Inventors
- 👤 William E Moore
- 👤 George L Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0438; B01D53/0446; B01D53/26; B01D53/261; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; B01D2253/00; B01D2253/10; B01D2253/104; B01D2257/00; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40005; B01D2259/40083; B01D2259/40086; B01D2259/40088; B01D2259/40096; B01D2259/45; B01D2259/4508; F24F2003/1458; F24F2003/1464
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) | 1943-06-11 | 1943-12-11 | 1944-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-11 | 1947-12-11 | 1948-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-11 | 1951-12-11 | 1952-06-11 | $7700.00 | Window Closed / Lapsed |